An educator is interested in the relationship between how
many hours students spend doing homework and the
scores earned on exams. He gathers data from 12
students and calculates the least-squares regression
line to be y = 68.4 + 1.46x, where y is the score on an
exam and x is the number of hours spent doing
homework. The residual plot is shown.
Based on the residual plot, is the linear model
appropriate?
O No, the residuals are relatively large.
O No; there is a clear pattern in the residual plot.
O Yes, there is no clear pattern in the residual plot.
O Yes, about half of the residuals are positive and half
are negative.

An Educator Is Interested In The Relationship Between Howmany Hours Students Spend Doing Homework And

Answers

Answer 1

The linear model, based on the residual plot shown and the data from the 12 students is appropriate because D. Yes, about half of the residuals are positive and half are negative.

Why is the linear model best ?

When analyzing a residual plot, an appropriate linear model should display the following characteristics:

The residuals should be randomly scattered around the horizontal axis (which represents a residual of zero).There should be no apparent patterns or trends in the plot.The variance of the residuals should be roughly constant across the range of the independent variable.

Looking at the residual plot for the hours spent by students doing homework and their performance on exams, we can see that the residuals are scattered randomly, there is no apparent pattern and the number of residuals above and below the line are roughly equal.

The linear model is therefore best.

Find out more on linear models at https://brainly.com/question/31030515


#SPJ1


Related Questions

The most powerful volcanic eruption on earth in the last 10,000 years was approximately VEI 7.3 (Mt. Rinjani in Indonesia). The most powerful volcanic eruption in the last 100 years was the 1991 eruption of Mt. Pinatubo in the Philippines (I remember it very well). It was rated a 6.0. How much larger was the Mt. Rinjani eruption than the Mt. Pinatubo eruption?

Answers

This means that the Mt. Rinjani eruption was approximately 20 times larger and more powerful than the Mt. Pinatubo eruption.

What is exponent?

An exponent is a mathematical operation that involves raising a base number to a certain power. The exponent tells how many times the base number should be multiplied by itself. For example, in the expression 2³, 2 is the base number and 3 is the exponent, and it means that 2 should be multiplied by itself three times: 2 x 2 x 2 = 8. Exponents are commonly used in algebra, calculus, and other branches of mathematics.

Here,

The Volcanic Explosivity Index (VEI) is a logarithmic scale used to measure the relative size and power of volcanic eruptions. Each increase of 1 on the VEI scale represents a tenfold increase in the eruption's size and power.

The difference in VEI between the Mt. Rinjani eruption and the Mt. Pinatubo eruption is 7.3 - 6.0 = 1.3.

To calculate the difference in size and power, we need to raise 10 to the power of 1.3:

10¹.³ = 19.95

To know more about exponent,

https://brainly.com/question/11709654

#SPJ1

12.
Find the Volume of the solid below;
Round to the nearest one hundredth
Use your pi #button when applicable.
10 ft
17 ft
6 ft
8 ft

Answers

The volume of the given solid above which is a triangular prism would be = 510 ft³.

How to calculate the volume of the solid shape ?

To calculate the volume of the given prism the formula should be used such as;

Volume = 1/2 × base× height × length

Where base = 10ft

height = 6 ft

length = 17ft

Volume = 1/2 × 10×6×17

= 5×6×17

= 510 ft³

Therefore the volume of the given shape above would be = 510 ft³ when the formula for triangular prism is used.

Learn more about volume here:

https://brainly.com/question/28795033

#SPJ1

Prove that cyclic trapezium is always isosceles and its diagonal are equal​

Answers

In our proof, as the trapezium are congruent and the rest of the sides are equal ∴AC = BD. Hence, the cyclic trapezium is isosceles and its diagonals are equal.

How do we prove cyclic trapezium is always isosceles and its diagonal are equal​?

Step 1:

The diagonals are AC and BD, and the line CE is parallel to AD.

We know that a parallelogram's opposite angles are equal.

∠D = ∠AEC......(1)

We also know that the sum of a cyclic quadrilateral's opposite angles is 180 degrees.

∠D + ∠ABC = 180..........(2)

We can deduce from (1) and (2) that

AEC + ABC = 180....... (3)

AEC and CEB are now a linear pair.

AEC + CEB = 180................. (4)

We can conclude from (3) and (4) that,

CEB = ABC

The sides opposite the equal angles are also equal, as we know.

CEB = ABC

CE = CB ... (5)

However, because AECD is a parallelogram, opposite sides must be equal.

∴CE = AD ... .(6)

From equation (5) and (6), we can conclude that

AD = CB ......(7)

As a result, the cyclic trapezium ABCD is isosceles.

Step 2:

Establishing that its diagonals are equal.

We have AC and BD as diagonals.

In triangle DBA and CBA,AD = CB from (7)⇒AB = AB (common side).

ADB + ACB (angles in the same segment of a circle are equal). As a result of the SAS rule, ABD and ABC are congruent.

Because they are congruent and the other sides are equal, AC = BD. As a result, a cyclic trapezium is isosceles and has equal diagonals.

Read more about isosceles

brainly.com/question/29793403

#SPJ1

What is the answer?

Answers

The expression which is equivalent to [tex](\frac{3}{2})^8[/tex] is [tex]$\frac{3^6}{2^8}$[/tex] . So, correct option is C.

Describe Exponential Expression?

An exponential expression is a mathematical expression that involves a base raised to an exponent. The base is usually a fixed number, and the exponent represents the number of times the base is multiplied by itself. For example, in the expression [tex]2^3[/tex] the base is 2 and the exponent is 3. This means that 2 is multiplied by itself three times, resulting in the value of 8.

Exponential expressions are commonly used in many areas of mathematics and science, as well as in everyday life. For example, they can be used to represent growth rates, decay rates, population growth, radioactive decay, and compound interest.

Exponential expressions can be simplified using the laws of exponents, which allow us to combine or simplify expressions with the same base. Some common laws of exponents include:

Product law: [tex]a^m x a^n = a^(m+n)[/tex]

Quotient law: [tex]a^m / a^n = a^(m-n)[/tex]

Power law: ([tex]a^m)^n = a^(mn)[/tex]

Negative exponent law: [tex]a^(-m) = 1 / a^m[/tex]

Zero exponent law: [tex]a^0 = 1[/tex]

Exponential expressions can also be graphed on a coordinate plane, producing a curve called an exponential function. The shape of the curve depends on the value of the base and the sign of the exponent, and can be used to model a wide range of real-world phenomena.

To know more about exponents visit:

brainly.com/question/4250446

#SPJ1

(100 POINTS) One root of $x^2 + 12x + k = 0$ is twice the other root. Find $k.$

Answers

Answer:

k=32

Step-by-step explanation:

One root of x^2 + 12x + k = 0 is twice the other root. Find k

k will be the product of the two roots

12 will be the sum of the two roots

12/3=4

4*2=8

The two roots are 4,8

Multiply 4 and 8, you get 32.

k=32

Round to the nearest tenth.

Answers

Answer:

E =53.1

Step-by-step explanation:

sin=opposite ÷ hypotenuse

opposite side of E = 4

hypotenuse = 5

4÷5=0.8

sin^-1 (0.8) = 53.1

E=53.1

Suppose that \( f(x)=h^{-1}(x) \) and that both \( j \) and \( h \) are defined for all values of \( x \). Let \( h(11)=2 \) and \( f(12)=-7 \). Evaluate the following if possible. If it is not possib

Answers

h(2) + j(−7) = −7(1 + j)

Suppose that f(x) = h^−1(x) and that both j and h are defined for all values of x. Let h(11) = 2 and f(12) = −7. We need to evaluate the following. h(2) + j(−7)For finding the value of h(2), we can use f(x) = h^−1(x) where x = h(2)f(h(2)) = 2h(2) = f^−1(2)We need to find h(2). Therefore, we need to find f^−1(2). We know f(12) = −7f(h(2)) = 2⟹ h(2) = −7Substitute h(2) = −7 in h(11) = 2h(11) = h(2 + 9) = h(2) + 9 = 2 + 9 = 11Therefore, h(2) = −7 and h(11) = 2.h(2) + j(−7) = −7 + j(−7) = −7(1 + j)Therefore, h(2) + j(−7) = −7(1 + j).

Learn more about evaluate

brainly.com/question/20067491

#SPJ4

Averi was trying to factor 4x^2+20x-164x

2

+20x−164, x, squared, plus, 20, x, minus, 16. She found that the greatest common factor of these terms was 4 and made an area model:



What is the width of Averi's area model?

Answers

The width of Averi's area model is 4 units.

The area model for factoring 4x²+20x-16 is shown above. The width of Averi's area model is 4 units. To factor the given expression, Averi used an area model.

In this model, the width represents the greatest common factor of the given expression while the length represents the remaining factors of the expression. Averi determined that the greatest common factor of 4x²+20x-16 was 4.

Therefore, she created a rectangle with a width of 4 and a length of (x²+5x-4). The dimensions of the rectangle are determined by the factors of the given expression.

The area of the rectangle represents the original expression. Therefore, the area of the rectangle can be calculated by multiplying the width and length of the rectangle. The area of the rectangle is equal to: Area of rectangle = width x length Area of rectangle = 4(x²+5x-4)Area of rectangle = 4x²+20x-16

For more such questions on Area

https://brainly.com/question/25292087

#SPJ11

Calculate the bearing of G from H. 215° N G H​

Answers

G is 215° North from H in bearing terms. This means that to get from point H to point G, one must travel in a northerly direction at an angle of 215°.

The bearing of G from H is 215° North. This means that to get from point H to point G, one must travel in a northerly direction at an angle of 215°. Bearings are typically measured in degrees, where north is 0° and east is 90°. To calculate the bearing of G from H, you must first draw a line from H to G. After that, calculate the angle between the line you drew and north.. This angle is the bearing of G from H. Bearings can also be expressed as a three-letter compass direction (such as NNE or SW). To calculate the three-letter compass direction, divide the bearing into four quadrants (0-90° = N, 90-180° = E, 180-270° = S, 270-360° = W) and then divide each quadrant further into three sections. For example, if the bearing of G from H is 215°, it would be expressed as SW, since it falls within the 270-360° quadrant. Bearings are useful for navigation, determining the direction of a destination from a starting point, and for plotting points on a map.

Learn more about angle here

https://brainly.com/question/28451077

#SPJ4

during the lunch rush, a fast food joint sold 10 sodas and earned $30 which is the rate of dollars per soda?

Answers

Answer:

1:3 is your rate for dollars per soda

Step-by-step explanation:

This trapezoid has been divided into two right triangles and a rectangle. how can the area of the trapezoid be determined using the area of each shape? enter your answers in the boxes. the area of the triangle on left is in², the area of the triangle on the right is in², and the area of the rectangle is in². the area of the trapezoid is the sum of these areas, which is in².

Answers

A trapezoid has been divided into two right triangles and a rectangle, see the above figure. Area of the triangle on left is 9 in². The area of the triangle on the right is 9 in², and the area of the rectangle is 108 in². The area of the trapezoid is the sum of these areas, which is 126 in².

We have a trapezoid, ABCD see in above figure has been divided into two right triangles, i.e., ∆BEC, ∆DAF and a rectangle, ABEF. We have to determine the area of trapezoid. Now, as we know area of a figure divides into pieces is equals to the sum of areas of each piece of figure. So, the area of trapezoid, ABCD is sum of area of two right triangles, i.e., ∆BEC, ∆DAF and a rectangle, ABEF. From above figure, In case of right triangles,

The base length of the triangle BEC= 2 in

height of triangle BEC = 9 in

Area of triangle BEC = (1/2)× base× height

=> Area of ∆BEC = (1/2)× 9× 2

= 9 in² Similarly, Area of triangle DAF = 9 in²

Therefore, the required area is 2×( Area of the triangle), A₁ = 2× 9 sq. in

= 18 in²

Now, length of rectangle ABEF, l = 12 in

width of rectangle, w = 9 in

Area of rectangle ABEF, A₂ = l×w

= 12× 9 = 108 in²

Thus, the required area = A₁ + A₂

= 18 in² + 108 in² = 126 in²

Hence required area is 126 in².

For more information about area of trapezoid, visit :

https://brainly.com/question/1463152

#SPJ4

Complete question:

This trapezoid has been divided into two right triangles and a rectangle, see the above figure. how can the area of the trapezoid be determined using the area of each shape? enter your answers in the boxes. the area of the triangle on left is ___ in², the area of the triangle on the right is___ in², and the area of the rectangle is__ in². the area of the trapezoid is the sum of these areas, which is___ in².

Rachel, Sam and Thomas applied for a common position at the company. Only one of them will be hired for the position. The probabilities that each of them is hired for the role are given by 1 out of 7, 2 out of 7, and 4 out of 7 respectively.The probabilities that Rachel, Sam and Thomas can help boost the company’s revenue are given by 4 out of 5, 1 out of 2, and 3 out of 10 respectively if they are hired.(a) Find the probability that Thomas is selected for the position given that the company’s revenue did not improve.(b) Find the probability, p, that the company’s revenue will generally improve.Rachel, Sam and Thomas interviewed at another company for another position. The probabilities that each of them is hired for the role are now given by x, 2x and 4x respectively.It can be assumed that the hiring process for each individual candidate are independent of one another.(c) Suppose there is no limit to the number of hires the company can make (i.e. the company can hire any one of them, any two of them, all three of them or no one at all). Find an inequality that must satisfied by x.

Answers

(a) The probability that Thomas is selected for the position given that the company's revenue did not improve is 4/7.

(b) To find the probability, p, that the company's revenue will generally improve, we can calculate the probability that at least one of Rachel, Sam, or Thomas is selected for the position.

This can be done by calculating the sum of the probabilities of each of them being hired, which is 1/7 + 2/7 + 4/7 = 7/7 = 1. Therefore, the probability that the company's revenue will generally improve is 1.

(c) To find an inequality that must be satisfied by x, we must take into account the probabilities that each of Rachel, Sam, and Thomas is hired for the role.

For example, if x = 1/2, then the probability that Rachel is hired is 1/2, Sam is hired is 1, and Thomas is hired is 2. Therefore, the inequality that must be satisfied by x is 0 < x ≤ 1/2.

For further information on (a) The probability that Thomas is selected for the position given that the company's revenue did not improve is 4/7.

(b) To find the probability, p, that the company's revenue will generally improve, we can calculate the probability that at least one of Rachel, Sam, or Thomas is selected for the position. This can be done by calculating the sum of the probabilities of each of them being hired, which is 1/7 + 2/7 + 4/7 = 7/7 = 1. Therefore, the probability that the company's revenue will generally improve is 1.

(c) To find an inequality that must be satisfied by x, we must take into account the probabilities that each of Rachel, Sam, and Thomas is hired for the role. For example, if x = 1/2, then the probability that Rachel is hired is 1/2, Sam is hired is 1, and Thomas is hired is 2. Therefore, the inequality that must be satisfied by x is 0 < x ≤ 1/2.

For further information on probability, refer below:

https://brainly.com/question/30034780

#SJP11

*3 SIMPLE GEOM QUESTIONS!!*
please help me with this study guide!
I appreciate it!
Thank you so muchhh <3

Answers

Therefore , the solution of the given problem of coordinates comes out to be the coordinates of the reflection of G(3, -2) across the y-axis (-3, -2).

Explain coordinate.

By utilising one or even more variables or coordinates, a coordinate system is able to precisely locate points or other mathematical items on such a room, including Euclidean space. Coordinates, which seem to be pairs of integers, are used to locate a point or object on a double plane. The y and x vectors are used to represent the position of a point on a two-dimensional surface. a group of figures used to designate particular places.

Here,

G(3, -2) will have the following coordinates after being reflected across the y-axis:

=> (-3, -2).

A point's x-coordinate changes sign when it is reflected across the y-axis, but its y-coordinate stays the same.

Consequently, the coordinates of the reflection of G(3, -2) across the y-axis (-3, -2).

To know more about coordinates visit:

https://brainly.com/question/27749090

#SPJ1

The coordinates of the resulting point after the reflection across the y - axis will be G'(3, 2) and The coordinates of the resulting point after the reflection across the x - axis will be G'(3, 2).

What do you mean by reflection of coordinates?

A reflection on the coordinate     plane (x , y ) is a type of transformation. It takes a geometric figure such as a line,    segment, point or shape and transforms it into a congruent   geometric figure called the image.

a. It is given that a point (-3, 2) reflected   across the y - axis.

Now, when any given coordinate    is reflected across the y - axis then, the sign of the x - coordinate is inverted and the y - coordinate remains same.

Therefore, the coordinates of the resulting    point after the reflection across the y - axis    will be G'(3, 2)

b. It is given that a point (3, -2) reflected   across the x - axis.

Now, when any given coordinate    is reflected across the x - axis then, the sign of the y - coordinate is inverted and the x - coordinate remains same.

Therefore, the coordinates of the resulting    point after the reflection across the x - axis    will be G'(3, 2).

To learn more about congruent, visit :

https://brainly.com/question/27922830

#SPJ1

Quantity of fuel uterlized by water tanker March 2022

Answers

The quantity of fuel utilized by the water tanker in March 2022 is 10,580 litres. The total amount of money that was utilized on fuel for the water tanker in March 2022 is R206,929.00.

To determine the quantity of fuel utilized by the water tanker in March 2022, we need to first calculate the total distance that the water tanker has covered in March 2022.

The total distance covered can be calculated using the formula:

distance = rate × time

From Annexure A, we can see that the water tanker was supplied to the construction site on the following dates in March 2022:

March 1, 2, 3, 6, 7, 8, 9, 10, 13, 14, 15, 16, 17, 20, 21, 22, 23, 24, 27, 28, 29, 30, and 31

Counting the number of days, we get a total of 23 days. Since the water tanker was supplied every day, we can assume that it covered the same distance every day.

The rate of fuel consumption of the Mercedes water tanker averages 5 km/l, which means that it can travel 5 km for every litre of fuel it consumes. Therefore, the distance covered by the water tanker on a full tank of fuel is:

distance = rate × fuel capacity

= 5 km/l × 460 litres

= 2300 km

So, the total distance covered by the water tanker in March 2022 is:

distance = 23 days × 2300 km/day

= 52,900 km

Next, we can determine the quantity of fuel utilized by the water tanker in March 2022 using the formula:

quantity of fuel = distance ÷ rate

Using the values we have calculated, we get:

quantity of fuel = 52,900 km ÷ 5 km/l

= 10,580 litres

Therefore, the quantity of fuel utilized by the water tanker in March 2022 is 10,580 litres.

To determine the total amount of money that was utilized on fuel for the water tanker in March 2022, we can multiply the quantity of fuel utilized by the fuel price in March 2022:

total cost = quantity of fuel × fuel price

From the problem statement, the fuel price in March 2022 was R19.55 per litre. Substituting the values we have calculated, we get:

total cost = 10,580 litres × R19.55/litre

= R206,929.00

Therefore, the total amount of money that was utilized on fuel for the water tanker in March 2022 is R206,929.00.

Complete question:

Records of the number of water tankers that were supplied to the construction site appear in the calendar on ANNEXURE A. The water tanker has a fuel capacity of 460 litres. The rate of fuel consumption of the Mercedes water tanker averages 5 km/l. The prices of fuel per litre in March and June 2022 appear below. MARCH 2022 FUEL PRICES DIESEL 50 ppm (a 4. 1) (b ) COST R19,55 JUNE 2022 FUEL PRICES DIESEL 50 ppm Source: COST R24,14 Calculate the total distance that the water tanker has covered in March 2022. Hence, determine the quantity of fuel that was utilized by the water tanker in March 2022. Determine the total amount of money that was utilized on fuel for the water tanker in March 2022​. Quantity of fuel utilized by water tanker March 2022

To learn more about fuel

https://brainly.com/question/14845889

#SPJ4

the common ratio of -1, 4, -7, 10 ​

Answers

In response to the given question, we can state that We may infer that there is no common ratio for this sequence because the ratios change for each computation. As a result, it is not a geometric sequence.

what is a sequence?

A sequence is a collection of numbers (or "terms"). Examples of words are 2, 5, and 8. Certain sequences may be made infinitely long by takes advantage of a specific pattern they follow. To continue the sequence, use the case of 2,5,8 or add 3. There are formulae that show where to seek for words in a sequence. A sequencing in mathematics is a collection of items that are in some order (or events). It is similar to a set in that it has components (also called elements or terms). The length of a sequence is defined as the total, possibly unlimited number of ordered items. the act of arranging two or more elements in a logical sequence.

To get the common ratio of a geometric series, divide any phrase by the term before it.

Let us divide the second term by the first term:

4 ÷ (-1) = -4

Let us now divide the third term by the second term:

(-7) ÷ 4 = -1.75

Lastly, let us divide the fourth term by the third term:

10 ÷ (-7) = -1.42857142857 (rounded to 11 decimal places) (rounded to 11 decimal places)

We may infer that there is no common ratio for this sequence because the ratios change for each computation. As a result, it is not a geometric sequence.

To know more about sequence visit:

https://brainly.com/question/21961097

#SPJ1


A circle has a radius of 6 feet and a circumference of approximately 37.70 feet. Complete the sentence to describe
how to estimate the value of 7.
Move the correct answer to each box. Not all answers will be used.
6 12 37.70
To estimate the value of x, divide

Answers

37.70/12

MARK ME AS BRAINLIEST :)

Max builds rail fences for one style of the fence each section uses 3 vertical fence posts and 6 horizontal rails how many rails does he need for a fence that has 27 posts completely the rules and use the rules to complete the table​

Answers

Max needs 54 horizontal rails to build a fence with 27 vertical posts.

The problem states that each section of the fence uses 3 vertical fence posts and 6 horizontal rails. This means that for every section of fence, there are 3 vertical posts and 6 horizontal rails.

To find out how many horizontal rails Max needs for a fence with 27 vertical posts, we need to figure out how many sections of fence Max needs to build.

Since each section of fence has 3 vertical posts, apply unitary method, we can divide the total number of vertical posts by 3 to find out how many sections of fence Max needs to build:

27 / 3 = 9

So Max needs to build 9 sections of fence.

Since each section of fence has 6 horizontal rails, we can multiply the number of sections by 6 to find out how many horizontal rails Max needs in total:

9 x 6 = 54

Learn more about unitary method here

brainly.com/question/22056199

#SPJ4

Answer this ASAP will give the brainliest answer
Given that y = 11 cm and θ = 38°, work out x rounded to 1 DP.

Answers

x ≈ 17.8 cm (rοunded tο 1 decimal place).

What is trigοnοmetric functiοn ?  

The trigοnοmetric functiοns in mathematics are real functiοns that relate the angle οf a right-angled triangle tο the ratiοs οf its twο side lengths. They are alsο knοwn as circular functiοns, angle functiοns, οr gοniοmetric functiοns.

All geοsciences, including navigatiοn, sοlid mechanics, celestial mechanics, geοdesy, and many οthers, use them extensively. They are sοme οf the mοst straightfοrward periοdic functiοns, and as a result, Fοurier analysis is frequently used tο study periοdic phenοmena.

Tο sοlve fοr x, we can use the trigοnοmetric functiοn cοsine since we have the adjacent side and the hypοtenuse.

cοs(θ) = adjacent/hypοtenuse

cοs(38°) = x/hypοtenuse

We knοw that the perpendicular is y = 11 cm, sο we can use the Pythagοrean theοrem tο find the hypοtenuse:

[tex]\rm hypotenuse^2 = perpendicular^2 + base^2[/tex]

[tex]x^2 = y^2 + (adjacent)^2[/tex]

[tex]x^2 = 11^2 + (x cos(38^\circ))^2[/tex]

[tex]x^2 = 121 + (x 0.7880107536)^2[/tex]

[tex]x^2 = 121 + 0.6201117996x^2[/tex]

[tex]0.3798882004x^2 = 121[/tex]

[tex]x^2 = 318.5022183[/tex]

x ≈ 17.84 cm (rounded to 1 decimal place)

Therefore, x ≈ 17.8 cm (rounded to 1 decimal place).

Learn more about  trigοnοmetric functiοn

https://brainly.com/question/6904750

#SPJ1

Based on estimates from the united nations population division , in 2020 the population of estonia was 1. 33x10^6 people. In 2020 the population of India was approximately 1. 38 x10^9. About how many orders of magnitude as populated was India in 2020

Answers

The population of India in 2020 was approximately 1.38x10^9 people, while the population of Estonia in 2020 was approximately 1.33x10^6 people. This means that India was approximately 103 orders of magnitude more populated than Estonia in 2020.
To calculate the difference in orders of magnitude between India and Estonia, divide India's population (1.38x10^9) by Estonia's population (1.33x10^6). This gives a result of 1.03x10^3, or 103 orders of magnitude.
In other words, India's population was 103 times bigger than Estonia's population in 2020. This difference can also be expressed as India being 10,300,000,000 times more populated than Estonia in 2020.

For more such population related questions

https://brainly.com/question/29885712

#SPJ11

This question has two parts. First, answer Part A. Then, answer Part Part A SOFTWARE A software company releases two products: a home version of their photo editor, which costs $20, and a professional version, which costs $45. The company sells 1000 copies of the photo editing software, earning a total revenue of $38,075. Write and solve a system of equations to determine how many home versions and professional versions of the software the company sold. Let h = the number of home versions sold and D = the number of professional versions sold

Answers

A system of equations to determine the number of home versions and professional versions of the software the company sold is given by:

20h + 45p = 38,075

h + p = 1000

The number of home versions sold is 277 and the number of professional versions sold is 723.

How to write an equation to model this situation?

In order to write a linear equation to describe this situation, we would assign variables to the number of home versions sold and the number of professional versions sold respectively, and then translate the word problem into a linear equation as follows:

Let the variable h represent the number of home versions sold.Let the variable p represent the number of professional versions sold.

Since a home version of their photo editor cost $20, and a professional version, cost $45, a linear equation that models the situation is given by:

20h + 45p = 38,075

Additionally, the company sold 1000 copies of the photo editing software;

h + p = 1000

Solving the equations simultaneously, we have:

20h + 45(1000 - h) = 38,075

20h + 45,000 - 45h = 38,075

25h = 6,925

h = 277 home versions.

p = 1000 - h

p = 1000 - 277

p = 723 professional versions.

Read more on equation here: brainly.com/question/28916487

#SPJ1

If a person walks 1 2 2 1 ​ mile in each 1 4 4 1 ​ hour, compute the unit rate in miles per hour.

Answers

The unit rate is 8.4 miles per hοur.

What dοes distance means?  

Distance and displacement are twο quantities that seem tο mean the same but are distinctly different with different meanings and definitiοns. Distance is the measure οf “hοw much grοund an οbject has cοvered during its mοtiοn” while displacement refers tο the measure οf “hοw far οut οf place is an οbject.”

Tο find the unit rate in miles per hοur, we need tο divide the distance by the time.

The distance is 1 2 2 1  miles and the time is 1 4 4 1  hοurs.

Sο, the unit rate in miles per hοur is:

(1 2 2 1  miles) / (1 4 4 1  hοurs) = 8.4 miles per hοur (rοunded tο οne decimal place)

Therefοre, the unit rate is 8.4 miles per hοur.

Learn more about displacement

https://brainly.com/question/11934397

#SPJ1

HELP PLEASE!! URGENT!!

Measure your own height and arm span (from finger-tip to finger-tip) in inches. You will likely need some help from a parent, guardian, or sibling to get accurate measurements. Record your measurements on the "Data Record" document. Use the "Data Record" to help you complete Part Two of this project.

Measure 11 additional people, and record their arm spans and heights in inches. You may use the sample data provided in the table if you do not have 11 people to measure.
Arm Span (inches) Height (inches)
58 60
49 47
51 55
19 25
37 39
44 45
47 49
36 35
41 40
46 50
58 61

Part Two: Representation of Data with Plots
Using graphing software of your choice, create a scatter plot of your data. Predict the line of best fit, and sketch it on your graph.
Copy and paste your scatter plot into a word processing document.

Part Three: The Line of Best Fit
Include your scatter plot and the answers to the following questions in your word processing document:
Which variable did you plot on the x-axis, and which variable did you plot on the y-axis? Explain why you assigned the variables in that way.
Write the equation of the line of best fit using the slope-intercept form of the line y = mx + b. Show all your work, including the points used to determine the slope and how the equation was determined.
What does the slope of the line represent within the context of your graph? What does the y-intercept represent?
Test the residuals of two other points to determine how well the line of best fit models the data.
Use the line of best fit to help you to describe the data correlation.
Using the line of best fit that you found in Part Three, Question 2, approximate how tall is a person whose arm span is 66 inches?
According to your line of best fit, what is the arm span of a 74-inch-tall person?

Answers

The equatiοn οf the line οf best fit is ŷ= 0.96x+3.79

The slοpe is 0.96

The y-intercept is 3.79

The heights οf peοple that have arm spans οf 66 inches is 67.15 inches and the heights οf peοple that have arm spans οf 74 inches is 74.83 inches.

What is y-intercept?

When the line tοuches the y-axis, it fοrms a y-intercept. Find the y when x = 0 tο find these. The y-intercept pοint will have the shape οf (0,y) When the line tοuches the x-axis, it fοrms an x-intercept.

We have the fοllοwing cοmputatiοn summary frοm the graphing calculatοr:

Sum οf X = 486

Sum οf Y = 506

Mean X = 44.1818

Mean Y = 46

Sum οf squares (SSX) = 1225.636

Sum οf prοducts (SP) = 1171

Hence, the fοrmula fοr the line οf best fit is ŷ= 0.96x+3.79

A linear regressiοn equatiοn is mentiοned

ŷ=mx+b

Where m is the slοpe, and b is the y-intercept

Sο, the slοpe is 0.96 and the y-intercept is 3.79

The heights οf peοple that have arm spans οf 66 inches and 74 inches

This means that:

x = 66 and x = 74

When x = 66,

y=0.96*66+3.79=67.15

When x = 74,

y=0.96*74+3.79= 74.83

To learn more about y-intercept from the given link

https://brainly.com/question/14180189

#SPJ1

Twenty-six less than the product of 5 and a number is 69. What is the number?

Answers

Answer:

19

Step-by-step explanation:

Product of 5 and a number is 5a

5a - 26 = 69

Add 26 to both sides

5a = 69+26

5a = 95

Divide both sides by 5

A = 19

Check

(5× 19) - 26 = 65

Which points are solutions to the linear inequality y < 0. 5x +

2? Select three options.

Answers

The three points that are solutions to the linear inequality y < 0.5x + 2 are (-3, -2), (-1, -2), and (1, -2)

To check which points are solutions to the linear inequality y < 0.5x + 2, we can substitute the coordinates of each point into the inequality and check whether the inequality is true or false.

For the point (-3, -2):

y < 0.5x + 2

-2 < 0.5(-3) + 2

-2 < -0.5

This inequality is true, so (-3, -2) is a solution.

For the point (-2, 1):

y < 0.5x + 2

1 < 0.5(-2) + 2

1 < 1

This inequality is false, so (-2, 1) is not a solution.

For the point (-1, -2):

y < 0.5x + 2

-2 < 0.5(-1) + 2

-2 < 1.5

This inequality is true, so (-1, -2) is a solution.

For the point (-1, 2):

y < 0.5x + 2

2 < 0.5(-1) + 2

2 < 1.5

This inequality is false, so (-1, 2) is not a solution.

For the point (1, -2):

y < 0.5x + 2

-2 < 0.5(1) + 2

-2 < 2.5

This inequality is true, so (1, -2) is a solution.

Therefore, the three points that are solutions are (-3, -2), (-1, -2), and (1, -2).

Learn more about linear inequality here

brainly.com/question/21857626

#SPJ4

The given question is incomplete, the complete question is:

Which points are solutions to the linear inequality y < 0. 5x +2? Select three options. (-3,-2) (-2,1) (-1,-2) (-1, 2) (1,-2)

Write a proportion for each set of similar polygons. Solve for the unknown side.

Type the FULL Answer for both questions.


Pls Answer!

Answers

Step-by-step explanation:

The proportion of similar triangles are

[tex] \frac{3}{4} = \frac{9}{r} [/tex]

Solving for r

[tex] \frac{4}{3} = \frac{r}{9} [/tex]

[tex] \frac{9 \times 4}{3} = r[/tex]

[tex]12 = r[/tex]

Does there exist a triangle with side lengths 12 , 5​ , 15 ?

Answers

Answer:

yes, a triangle with the side lengths 12, 5, and 12 does exist.

Step-by-step explanation:

side a = 12

side b = 5

side c = 12

area = 29.34In

Please help ASAP!!
Will mark brainlest
Assignment due at 12:00​

Answers

Answer:

(1,5)?

Step-by-step explanation:

A small business owner estimates his mean daily profit as with a standard deviation of. His shop is open days a year. What is the probability that his annual profit will exceed ? Carry your intermediate computations to at least four decimal places. Report your result to at least three decimal places

Answers

The probability that the small business owner's annual profit will not exceed $100,000 is about 0.0571

We can use the central limit theorem to approximate the distribution of the annual profit. The central limit theorem states that the sum of a large number of independent and identically distributed random variables will be approximately normally distributed.

Let X be the daily profit, then the annual profit, Y, is given by Y = 105X. The mean of Y is:

μY = 105μX = 105(975) = 102375

The variance of Y is:

σY^2 = 105σX^2 = 105(129)^2 = 2244385

The standard deviation of Y is:

σY = sqrt(2244385) ≈ 1498.12

We want to find the probability that the annual profit will not exceed $100,000, which is equivalent to finding the probability that Y ≤ 100000. We can standardize Y using the formula:

Z = (Y - μY) / σY

Substituting the values, we get:

Z = (100000 - 102375) / 1498.12 ≈ -1.58

We can use a standard normal distribution table or calculator to find the probability that Z ≤ -1.58. This probability is approximately 0.0571.

Learn more about probability here

brainly.com/question/11234923

#SPJ4

The given question is incomplete, the complete question is:

A small business owner estimates his mean daily profit as $975 with a standard deviation of $129. His shop is open 105 days a year. What is the probability that his annual profit will not exceed $100,000?

Nisha read the part of a book in 1 hour. How much part of the book will be read by
her in 3 2/5
hours?

Answers

Can you list the part that they read, like what fraction

Please only comment if your going to help me thanks!

Answers

The volume of the rectangular prism is 36 cubic centimeters.

How to find the volume of a rectangular prism?

For a rectangular prism of height H, length L and width W, the volume is given by the product between these 3 quantities, here we will get:

V = H*L*W

On the image we can see a rectangular prism with the dimensions:

Height = 6cm

Length = 3cm

Width = 2cm

Then we can replace these values in the volume formula so we will get:

V=  6cm*3cm*2cm

V = 36 cm³

The volume of the prism is 36 cm³

Learn more about volume at:

https://brainly.com/question/1972490

#SPJ1

Complete question.

"The volume of a prism is the product between the dimensions, find the volume of the rectangular prism below".

Other Questions
Find the absolute maximum and minimum of the function on the given domain.f(x,y)=7x^2+2y^2 on the closed triangular plate bounded by the lines x=0, y=0, y+2x=2 in the first quadrantThe absolute maximum is ?The absolute minimum is ? I think account has a balance of $120 on January 1. Describe a situation in which the account balance for each month February 1 March 1 forms the following sequences in exercise one and two. Write the first three terms of each sequence. A jeweler had a fixed amount of gold to make bracelets and necklaces. The amount of gold in each bracelets is 7 grams And the amount of gold in each necklace is 24 grams. The jeweler used 172 grams of gold and made 2 more necklaces than bracelets. Write a system of equations that could be used to determine the number of bracelets made and the number of necklaces made. Define variabkes Please answer this question with the following proofs. A spinner is divided into 4 equal sections. The probability of landing on A is 1/4. Brandy spins the spinner 24 times. How many times can she expect the spinner to land on A? can someone answer this really quickWhat is a shaman?ResponsesA) a ritual sorcerer-priest able to deal with supernatural forces on behalf of humansa ritual sorcerer-priest able to deal with supernatural forces on behalf of humans B) someone who belongs to a minor branch of a royal familysomeone who belongs to a minor branch of a royal family C) a trader who also transports goods over long distances a trader who also transports goods over long distances D) a state official who administers tests to potential candidates for public office Find the perimeter of the shape below: The shape ABC in the quilt block shown is an isosceles triangle, where AB = AC. The perimeter of the triangle is 27.3 inches. Find the values of x and y. Then, find the length of each side of the triangle. Enter the correct answers in the boxes. AB= BC = AC= A random sample was taken to determine whether students from a certain classroom prefer to shop at Store A, Store B, or Store C. Which of the following would represent a random sample?A. putting all the names in alphabetical order and selecting every fourth B. student selecting all the students that have a last name that begins with RC. selecting all the girlsD. putting all the names in a hat and selecting six student Somebody please help me with my homework While more recently photography has shifted into the digital realm, this has not really changed how everyday people interact with photosA. True B. Falsesorry i dont know what subject to use its photography The coordinates of the points A and B are (0, 6) and (8, 0) respectively. (i) Find the equation of the line passing through A and B. Given that the line y = x + 1 cuts the line AB at the point MUK (ii) the coordinates of M, (iii) the equation of the line which passes through M and is parallel to the x-axis, (iv) the equation of the line which passes through M and is parallel to the y-axis. A city has cone-shaped buildings for storing salt and sand for icy roads. Eachbuilding has a radius of 30 feet and a height of 20 feet. Find the volume of thebuilding. Use 3.14 for .OA. 1884 ftOB. 18,840 ftOC. 628 ft3OD. 56,520 ft Describe the character of chubhukov as a sensible father describe what happens once the battle resumes. What does Diomedes do? What about Zeus? How does Agamemnon feel? (pgs. 43-45 I got up early and(have) a shower find number of conversion periods and rate of interest when compounded half-yearly for a sum of Rs 5000 is taken for 7 years and 9% p.a HISARNA DEVELOPING A SUSTAINABLE STEEL PRODUCTION PROCESS ABSTRACT The steel industry in Europe was looking for a way to increase the efficiency of steel production and redesign the production process in order reduce emissions to meet the European Unions targets of cutting the emissions by 80-95% of the 1990 levels by 2050. The steel industry formed a consortium along with universities and research organizations to identify technologies to help reduce carbon emissions, ensure energy efficiency, and achieve flexibility in the selection of raw materials in the steel industry. The consortium chose the European unit of India-based steel maker Tata Steel to execute a project to develop new steel making technology. The result was a new steel making technology HIsarna. This was developed and tested in Tata Steels IJmuiden plant in the Netherlands. The case describes the way in which the project was developed, executed, by bringing in different technologies, knowledge, and skills from various stakeholders.Comment on the following aspects of the case study:a) Who are the key stakeholders of the project? (4 Marks) b) What impact could these requested changes have on the steel industry? (1 mark) c) Describe what type of project is this? (3 Marks) d) What is the Scope of this Project? (4 marks)(e) B riefly define the outcome of the Project and how these outcomes might provide value. 1 paragraph (3 Marks).Produce a network diagram based upon the previous duration table in Microsoft Word or Excel using the information from the table, showing the early start, early finish, late start, late finish, slack, critical path and duration of the project.Upload the Microsoft Word file as your answer for this question. 5+5+5=15pts (Quadrics) Let Q=1 be a quadric surface in 3-dimensional affine Euclidean space R^3. (See the list of reduced quadrics given in Lecture 5). Determine which of these quadrics are - regular 2-surfaces; - ruled 2-surfaces. On p.271 of the book, M. Audin mentions that all quadrics appear as ruled surfaces if one allows lines to be imaginary. What does she mean by this statement? what type of planning involves assessing the risks to organizational processes and creating policies, plans, and procedures to minimize the impact those risks might have on the organization if they were to occur? business continuity planning business impact planning risk management planning disaster recovery planning