Answers
Answer:
x = 1, x = 7, and x = -1.
Step-by-step explanation:
o solve the polynomial equation x^3 - 7x^2 - x + 7 = 0, we can use a combination of synthetic division and factoring by grouping:
First, we need to find a root of the polynomial using the Rational Root Theorem. The possible rational roots of the polynomial are the factors of 7 (the constant term) divided by the factors of 1 (the leading coefficient), or ±1, ±7. By trying each of these values in the polynomial, we find that x = 1 is a root.
Using synthetic division, we can divide the polynomial by (x - 1) to obtain a quadratic equation:
1 | 1 -7 -1 7
| 1 -6 -7
|_____________
1 -6 -7 0
Therefore, (x - 1) is a factor of the polynomial, and we have:
x^3 - 7x^2 - x + 7 = (x - 1)(x^2 - 6x - 7)
Now we need to solve the quadratic equation x^2 - 6x - 7 = 0. We can factor it as (x - 7)(x + 1) = 0, so the solutions are x = 7 and x = -1.
Therefore, the solutions to the original polynomial equation x^3 - 7x^2 - x + 7 = 0 are x = 1, x = 7, and x = -1.
Related Questions
Find The Domain of each expression 5/√5-x
Answers
Which point is a solution to the equation 2x-7y=7?
Answers
The point which is a solution to the equation 2x - 7y = 7 as required to be determined is; (0, -1).
Which point represents a solution to the given equation?As evident from the task content; the point which is a solution to the given equation is to be determined.
For a given equation; the y-intercept represents a solution to the equation.
On this note, if x = 0; therefore, we have that;
2 (0) - 7y = 7
y = 7 / -7
y = -1.
Ultimately, the point which is a solution to the equation is; (0, -1).
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A painter mixed 56 oz of blue and yellow paint. The ratio is 3 to 11, how many ounces of blue paint did he use?
Answers
If a painter mixed 56 ounces of blue and yellow paint. The ratio is 3 to 11, 12 ounces of blue paint were utilized by the painter.
To solve the problem, we can use the ratio of blue to the total amount of paint to determine how many ounces of blue paint were used. The ratio of blue to the total paint is 3 to 11. This means that for every 3 parts of blue paint, there are 11 parts of total paint. We can use this information to set up a proportion:
3/14 = x/56
Where x represents the number of ounces of blue paint used. To solve for x, we can cross-multiply and simplify:
356 = 14x
168 = 14 × x
x = 12
Therefore, the painter used 12 ounces of blue paint.
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Write an explicit formula for � � a n , the � th n th term of the sequence 36 , 32 , 28
Answers
If the sequence is 36 , 32 , 28, then the explicit formula for term aₙ , the nth term is 40 - 4n.
The given sequence is 36, 32, 28, which is a decreasing arithmetic sequence with a common difference of -4.
To find the nth term of an arithmetic sequence, we can use the formula:
aₙ = a₁ + (n - 1)d
where a₁ is the first term, d is the common difference, and n is the term we want to find.
In this case, a₁ = 36, d = -4, and we want to find the nth term.
So, the formula for the nth term of the sequence is:
aₙ = 36 + (n - 1)(-4)
Simplifying this expression:
aₙ = 36 - 4n + 4
aₙ = 40 - 4n
Therefore, the explicit formula for the nth term of the given sequence is aₙ = 40 - 4n.
This formula can be used to find any term of the sequence by substituting the desired value of n. For example, to find the 6th term, we would plug in n = 6:
a₆ = 40 - 4(6) = 16
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x out of 3 - 2 x - 4 out of 4 is equal to 3
Answers
Expiation
To solve the equation, we need to simplify the left-hand side first. We can do this by finding a common denominator for the two fractions and then combining them.
x/3 - 2x - 4/4 can be written as (4x/12) - (8x/12) - (3/3) = (-4x/12) - (3/3)
Now, we can simplify further: (-4x/12) - (3/3) = (-x/3) - 1
So the equation becomes: (-x/3) - 1 = 3
To solve for x, we need to isolate the variable on one side of the equation.
Adding 1 to both sides, we get:
(-x/3) = 4
Multiplying both sides by -3, we get:
x = -12
Therefore, the solution to the equation is x = -12.
Kiel determines the zeros of the function f (a) to be -2, -5, and 7. Write a possible function to represent Kiel's function?
Answers
This function has zeros at x = -2, x = -5, and x = 7, since when any of these values are plugged into the function, the corresponding factor becomes zero, making the entire expression zero.
What is an expression?An expression is a combination of numbers, variables, and operators that represents a mathematical quantity or relationship. It can consist of a single number or variable, or it can be a more complex combination of terms.Expressions can be used to represent a wide range of mathematical ideas, such as functions, equations, inequalities, and identities.
In the given question,
A possible function that has zeros at -2, -5, and 7 is:
f(x) = a(x+2)(x+5)(x-7)
where a is a constant that determines the scale of the function.
Expanding the expression, we get:
f(x) = a(x³ + 5x² - 14x - 70)
This function has zeros at x = -2, x = -5, and x = 7, since when any of these values are plugged into the function, the corresponding factor becomes zero, making the entire expression zero.
Note that there are other possible functions that could have the same zeros, but this is one example.
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Jobs and productivity! How do retail stores rate? One way to answer this question is to examine annual profits per employee. The following data give annual profits per employee (in units of 1 thousand dollars per employee) for companies in retail sales. Assume ≈ 4. 0 thousand dollars
Answers
An effective indicator for assessing retail store efficiency, spotting market trends, and making strategic business decisions is annual earnings per employee for profits.
The retail sales industry's annual profits per employee are shown in the data. The data's mean or median is most likely about $4,000,000, according to the assumption. You may compare the productivity of several retail stores by looking at the annual profits per employee. Businesses that generate more annual earnings per employee are typically more productive than those that do not.
The information can also be utilized to spot patterns in the retail sector, such as which businesses are operating better than others. For instance, if a business has been steadily increasing its annual profit per employee, it can be a sign that it is growing or streamlining its operations. In contrast, a business with declining annual profits per employee might be having trouble or seeing a drop in the demand for its goods.
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7. Josh is going to draw a net of a rectangular
prism. How many rectangles should there
be in his drawing?
Answers
The number of rectangles in Josh's drawing should be 6.
What is rectangular prism?A three-dimensional solid shape that has six rectangular faces is a rectangular prism. It has eight vertices, or corners, and 12 edges connecting the vertices.
To draw a net of a rectangular prism, Josh needs to represent the three-dimensional object on a two-dimensional surface by drawing each face of the prism separately. A rectangular prism has six faces, and every face is a rectangle.
Josh needs to draw all six rectangles that make up the six faces of the prism. The six faces consist of a pair of congruent rectangles for the top and bottom faces, and four rectangles for the sides. Josh can arrange the six rectangles in different ways to create a net that will fold into a rectangular prism.
It is important that Josh draws the rectangles accurately and with correct dimensions to ensure that the net can be assembled into a rectangular prism.
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Devonte is studying for a history test. He uses 1/8 of a side of one sheet of paper to write notes for each history event. He fills 2 full sides of one sheet of paper. Which expression could be used to find how many events Devonte makes notes for? Barry chose D as the correct answer. How did he get that answer?
Answers
Answer:
The total amount of space Devonte uses to write notes on a single sheet of paper is 2 sides x 1 sheet of paper = 2/1 = 2.
And, for each event, he uses 1/8 of a side of the paper. Therefore, the number of events he writes notes for can be found by dividing the total amount of space he used by the amount of space used for each event:
Number of events = Total space used / Space used per event
We can substitute the values we know:
Number of events = 2 / (1/8)
Simplifying this expression by multiplying the numerator and denominator by 8, we get:
Number of events = 2 x 8/1
Number of events = 16
Therefore, Devonte made notes for 16 historical events. Option D, 16, is the correct answer.
Step-by-step explanation:
On Saturday, Noam made 5 quarts of applesauce. On Sunday he made 5 pints of applesauce. How much applesauce did he make in all?
Answers
Nοam made a tοtal οf 7.5 quarts οf applesauce in all.
What is quart ?The quart is an English unit οf vοlume equal tο a quarter gallοn. Three kinds οf quarts are currently used: the liquid quart and dry quart οf the US custοmary system and the imperial quart οf the British imperial system.
All are rοughly equal tο οne litter. It is divided intο twο pints οr (in the US) fοur cups. Histοrically, the exact size οf the quart has varied with the different values οf gallοns οver time and in reference tο different cοmmοdities.
Given that,
Nοam made - 5 quarts
There are 2 pints in 1 quart, sο 5 pints is equal tο 5/2 = 2.5 quarts.
Therefοre, Nοam made a tοtal οf 5 + 2.5 = 7.5 quarts οf applesauce in all.
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If 0 is the radian measure of a central angle of a circle and r is the radius of the circle, which is the correct derivation of the area, A, of the sector bounded by the sides
of the central angle and the arc it subtends?
Answers
If 0 is the radian measure of a central angle of a circle and r is the radius of the circle, the area of sector is 0.
The area of a sector of a circle is given by the formula:
A = (θ/2π) x πr^2
where θ is the central angle of the sector in radians and r is the radius of the circle.
In this case, the central angle is 0 radians, which means that the sector is actually a point at the center of the circle. Therefore, the area of the sector is 0.
Alternatively, we can think of the sector as being the entire circle, since a central angle of 0 radians covers no portion of the circle. In that case, the area of the sector would be:
A = (θ/2π) x πr^2
A = (0/2π) x πr^2
A = 0
Either way, the area of the sector is 0, since a central angle of 0 radians either forms a point or covers no portion of the circle.
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Help me please, I am not good at this unfortunately
Answers
Answer: Its 12 the answer.
Step-by-step explanation:
Explain how the amount of a down payment affects your monthly mortgage payments.
Nick found his dream home that has a purchase price of $192,000. Nick earns $3,325 a month and wants to spend no more than 30% of his income on his mortgage payment. He has saved up $35,000 for a down payment. Nick is considering the following loan option: 20% down, 30 year at a fixed rate of 6. 25%. What modification can be made to this loan to make it a viable option, given Nick’s situation?
Answers
This modification will reduce the amount he needs to borrow from the lender and thus lower his monthly mortgage payments.
The down payment is the amount of money that the buyer pays upfront towards the purchase price of the property. The more significant the down payment, the less money the buyer has to borrow from the lender, and this can have a significant impact on the monthly mortgage payments.
In the case of Nick, he has saved up 35,000 for a down payment, which is approximately 18% of the purchase price of the house. If he decides to go with the 20% down payment option, he will need to pay 38,400 upfront, which is 20% of 192,000. The remaining 153,600 will be the amount he borrows from the lender.
Now, let's assume that Nick has taken a 30-year fixed-rate mortgage at 6.25% interest. If he decides to pay 20% down payment, his monthly mortgage payments would be approximately 940. However, Nick wants to spend no more than 30% of his income on his mortgage payment, which is 997.50 per month (30% of 3,325). Therefore, the modification that can be made to this loan to make it a viable option is to reduce the loan amount.
If Nick reduces the loan amount to 153,000, his monthly mortgage payment will be approximately 910, which is within his budget. To achieve this, he will need to increase his down payment to 39,000, which is 20.3% of the purchase price. This modification will reduce the amount he needs to borrow from the lender and thus lower his monthly mortgage payments.
In summary, a larger down payment reduces the amount borrowed from the lender and, consequently, lowers the monthly mortgage payments. To make the loan option viable, Nick needs to increase his down payment to reduce the loan amount and meet his budget.
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The following exercise presents problems similar to exercises from the previous sections of this chapter.
Use Newton's Method to approximate the solution.
Find the point on the graph of f(x) = 5 − x^2 that is closest to the point (1, 0). (Round your answer to three decimal places.)
(x, y) = ?
Answers
The point οn the graph of [tex]f(x) = 5-x^2[/tex] that is clοsest to the point (1, 0) is (0.492, 4.592).
What is a graph ?
Graph can be defined as visual representation of data using given οrdered pairs.
To find the pοint on the graph οf [tex]f(x) = 5-x^2[/tex] that is closest to the point (1, 0), we need to minimize the distance between the two points. The distance between two points (x1, y1) and (x2, y2) is given by the formula:
d = sqrt((x2 - x1)² + (y2 - y1)²)
Sο, in this case, we want tο minimize the distance between (1, 0) and a pοint οn the graph οf f(x) = 5 − x², which can be written as (x, f(x)).
The distance between these twο pοints is:
d = sqrt((x - 1)² + (f(x) - 0)²)
We want tο minimize this distance, sο we need tο find the value οf x that minimizes this expressiοn. Tο dο this, we can use Newtοn's Methοd.
Let's define a functiοn g(x) as:
g(x) = (x - 1)² + (f(x) - 0)²
We want tο find the value οf x that minimizes g(x). Tο dο this, we need tο find the derivative οf g(x):
g'(x) = 2(x - 1) - 2f(x)f'(x)
We can substitute f(x) = 5 - x² and f'(x) = -2x intο this equatiοn:
g'(x) = 2(x - 1) + 4x(5 - x²)
Simplifying this expressiοn, we get:
g'(x) = 12x² - 8x - 8
Nοw we can use Newtοn's Methοd with the initial guess x0 = 0:
x1 = x0 - g(x0)/g'(x0)
x1 = 0 - g(0)/g'(0)
x1 = -0.6667
Using x1 as οur new guess, we repeat the prοcess:
x2 = x1 - g(x1)/g'(x1)
x2 = -0.6667 - g(-0.6667)/g'(-0.6667)
x2 = 0.4293
We cοntinue this prοcess until we reach a desired level οf accuracy. Let's say we want tο rοund οur final answer tο three decimal places. Then we can stοp οnce we find an xn such that |xn - xn-1| < 0.001.
Using a spreadsheet οr calculatοr, we can cοntinue this prοcess and find that:
x3 = 0.4873
x4 = 0.4915
x5 = 0.4916
Since |x5 - x4| < 0.001, we can rοund οur final answer tο three decimal places:
(x, y) = (0.492, 4.592)
Therefοre, the pοint οn the graph οf f(x) = 5 − x² that is clοsest tο the pοint (1, 0) is (0.492, 4.592).
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Select All ordered pairs that satisfy the function y= 5x + 5
A. (-3,-25)
B. (8,-10)
C. (8,45)
D. (-2,-5)
Answers
Answer:
Step-by-step explanation:u better not be him cause im him
Help with pre calc question
Answers
[tex]\tan^2(\theta )+3\tan(\theta )=0\implies \tan(\theta )[\tan(\theta )+3]=0 \\\\[-0.35em] ~\dotfill\\\\ \tan(\theta )=0\implies \theta =\tan^{-1}(0)\implies \theta = \begin{cases} 90^o\\ 270^o \end{cases} \\\\[-0.35em] ~\dotfill\\\\ \tan(\theta )+3\implies \tan(\theta )=-3\implies \theta =\tan^{-1}(-3)\implies \theta \approx \begin{cases} \stackrel{ II~Quadrant }{108.43^o}\\ \stackrel{ IV~Quadrant }{288.43^o} \end{cases}[/tex]
Jason wants to create a box with the same volume as the one shown below. He wants the length to be 4
inches. What would be the measurements of the width and height?
Answers
Answer:
Step-by-step explanation:The width would be 2 the same for the height
"Monte Carlo" methods are often used to test the effect of violating assumptions of statistical tests. have been used primarily to create new statistical methods, including the t test for independent means. were invented by Egon Pearson. were invented by "Student" (Gossett).
Answers
The t-test, contributed to the development of Monte Carlo methods by using it to study the normal distribution in small sample sizes.
Monte Carlo methods can be used to test the effect of violating statistical tests' assumptions. This technique is primarily used in creating new statistical methods, including the t test for independent means.The t-test is a statistical hypothesis test used to determine whether there is a significant difference between the means of two groups, which may be related in certain characteristics. The t-test is one of the most frequently used tests in statistics for testing hypotheses about the mean of a population based on a sample mean.
Assumptions are essential for a t-test because they help researchers make logical, trustworthy assumptions based on their statistical data. These assumptions may include the normality assumption, homogeneity of variance, and independent random sampling.
It is important to meet these assumptions to get the correct statistical results. Violating these assumptions can affect the accuracy of the results.Monte Carlo methods are used to simulate the probability of different outcomes in a process that cannot be easily predicted because of random variables. They are used to study systems with many variables that are not easily solved. Egon Pearson and Karl Pearson invented these methods to study Brownian motion. "Student" (Gosset), who is known for creating the t-test, contributed to the development of Monte Carlo methods by using it to study the normal distribution in small sample sizes.
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In a right triangle, cos
(
8
x
)
∘
(8x)
∘
= sin
(
2
x
−
10
)
∘
(2x−10)
∘
. Find the larger of the triangle’s two acute angles.
Answers
Answer:
80°
Step-by-step explanation:
You want the larger of two acute angles in a right triangle if their relationship is cos(8x°) = sin(2x-10°).
Complementary anglesThe cosine of an acute angle is equal to the sine of its complement. The given relation between the angles means ...
(8x) +(2x -10) = 90 . . . . . the angles are complementary
10x = 100 . . . . . . . . . . . add 10
x = 10 . . . . . . . . . . . . . divide by 10
The two angles are 8·10° = 80° and (2·10 -10)° = 10°.
The larger of the two acute angles is 80°.
The angle of depression of the top of a house from the top of a column of height 95.62 m. is 45° and the angle of elevation of the top of a column from the bottom of the house is 60°. Find the height of the house.
Answers
Answer: We can solve this problem using trigonometry and basic geometry. Let's first draw a diagram:
A (top of house)
/|
/ | h
/ |
/ |
/θ1 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
B (top of column)
| d
|
|
|
C (bottom of column)
We are given that angle theta 1 (θ1) is 45 degrees, angle theta 2 (θ2) is 60 degrees, and the height of the column BC is 95.62 meters. We want to find the height of the house AB, which we'll call "h".
First, we can use trigonometry to find the length of segment CD. Since we know angle θ2 and the length of BC, we can use the tangent function:
tan(θ2) = opposite / adjacent
tan(60°) = d / 95.62
d = 95.62 * tan(60°)
d ≈ 165.30 meters
Now we can use the fact that angles ABD and CBD are complementary to find the length of segment AD:
tan(θ1) = opposite / adjacent
tan(45°) = h / (d + 165.30)
h = (d + 165.30) * tan(45°)
h ≈ 165.30 meters
Therefore, the height of the house is approximately 165.30 meters.
Step-by-step explanation:
Rowan is taking his siblings to get ice cream. they can't decide whether to get a cone or a cup because they want to get the most ice cream for their money. if w = 4 in, x =6 in, y = 6 in, z = 2 in, and the cone and cup are filled evenly to the top with no overlap, which container will hold the most ice cream? use 3.14 for π, and round your answer to the nearest tenth.
Answers
The cup will hold more ice cream than cone since volume of cup is 169.6 cubic inches which is greater than volume of 25.1 cubic inches.
The volume of a cone is given by the formula:
V= 1/3.π[tex]r^{2}[/tex]h
where r is the radius of the circular base and h is the height.
The volume of a cylinder is given by the formula:
V= π[tex]r^{2}[/tex]h
where r is the radius of the circular base and h is the height.
Assuming that the height of both the cone and the cup is the same, we can compare their volumes by comparing their radii.
For the cone, the radius r is equal to half the diameter of the circular base, which is equal to w/2 = 2 in.
The height of the cone is equal to y, which is 6 in.
V= 1/3.π[tex]r^{2}[/tex]h= 1/3.π[tex]2^{2}[/tex]6
For the cup, the radius r is equal to x/2 = 3
The height of the cup is equal to y, which is also 6 in.
Using these values, we can calculate the volume of the cup as:
[tex]V_cup[/tex]= π[tex]r^{2}[/tex]h=π[tex]3^{2}[/tex]6
Therefore, the cup will hold more ice cream than the cone.
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Type the correct answer in each box. Diagram shows an array of 5 squares (left) and 2 triangles (right), in two rows. The ratio of the number of squares to the number of triangles in simplest form is : . The number of triangles that need to be added to make the ratio of the number of squares to the number of triangles 1 : 1 is .
Answers
The ratio of the number of squares to the number of triangles in simplest form is 5:2. The number of triangles that need to be added to make the ratio of the number of squares to the number of triangles 1 : 1 is 3.
What is the ratio?
A fraction that demonstrates how several times one quantity is of the other is the ratio of two quantities of the same kind and in the same units. Ratio is represented by the symbol ":". The expression a/b, which originally stood for the ratio of two measurements a and b (b≠ 0), is used.
Given that the number of squares are 5 and the number of triangles are 2.
The ratio of the number of squares to the number of triangles in simplest form is 5 : 2.
Assume that x number of triangles that needs to be added to make the ratio of the number of squares to the number of triangles 1 : 1.
The equation is:
5:(2+x) = 1:1
5/(2+x) = 1/1
Cross multiply both sides:
5 = 2 + x
x = 5 - 2
x = 3
3 triangles need to be added to make the ratio of the number of squares to the number of triangles 1 : 1
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what point represents the opposite of 1 1/3
Answers
Answer:
Point A represents -1 1/3.
Point A is correct.
A high school in a small town always has its homecoming day and parade on the first Saturday in October. From historical records, it has been determined that the probability of rain during the parade is 0.16. Amina will attend the high school for the next four years and plans to play in the marching band in the parade.(a) What is the probability that it will not rain on the homecoming parade in Amina's first year?(b) What is the probability that it will not rain on any of the homecoming parades during Amina's four years at the school? (Round your answer to three decimal places.)(c) What is the probability that it will rain on Amina's parade at least once during her four years of attendance? (Round your answer to three decimal places.)
Answers
a) The probability that it will not rain on the homecoming parade in Amina's first year is 0.84. b) The probability that it will not rain on any of the homecoming parades during Amina's four years at the school is 0.49. c) The probability that it will rain on Amina's parade at least once during her four years of attendance is 0.51.
We can solve this problem as:
a) This can be calculated by subtracting the probability of rain during the parade (0.16) from 1.
So, the probability is,
1 - 0.16 = 0.84.
b) This can be calculated by taking the probability of no rain (0.84) and multiplying it by itself four times.
So, the probability is,
0.84^4 = 0.49.
c) This can be calculated by subtracting the probability of no rain (0.49) from 1.
So, the probability is,
1 - 0.49 = 0.51.
In conclusion, the probability that it will not rain on the homecoming parade in Amina's first year is 0.84, the probability that it will not rain on any of the homecoming parades during Amina's four years at the school is 0.49, and the probability that it will rain on Amina's parade at least once during her four years of attendance is 0.51.
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a painter is paid by the hour .if he is paid R 360 for 12 hours work, how much will he be paid for 9 hours work
Answers
Answer:
R 270
Step-by-step explanation:
Amount paid for one hour = [tex]\frac{360}{12}[/tex]
Amount paid for one hour = Rs 30
Amount paid for 9 hours = 9 × 30
Amount paid for 9 hours = Rs 270
The painter will be paid Rs 270 for 9 hours of work.
Jamal had 13 feet of decorative tape to where between 5 Freinds and himself how much tape does each person get
Answers
each person would have 2 feet and two inches of tape
m
A: BC, AB, AC
b: AB ,BC, AC
c: AC ,AB, BC
d: AB ,AC, BC
Answers
In triangle ABC, AB + BC > AC is the correct option.
What is the triangle?Three straight sides and three angles make up the two-dimensional geometric shape known as a triangle. they can be of many types .
I think that the question is related to the triangle,
Choose the correct option for ∆ABC,
a. AB + BC > AC
b. AB + BC < AC
c. AB + AC < BC
d. AC + BC < AB
Given, ABC is a triangle.
We are aware that the length of a triangle's third side is always greater than the sum of its other two sides.
Let the two sides of ∆ABC is AB and BC and the third side is AC.
So, AB + BC > AC
Therefore, option a is true.
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What are the possible orderings of the sides of triangle ABC, given the three sides are AB, BC, and AC?
a: BC, AB, AC
b: AB ,BC, AC
c: AC ,AB, BC
d: AB ,AC, BC
onica deposits $400 into a savings account that pays a simple interest rate of 3.3%. Paul deposits $500 into a savings ccount that pays a simple interest rate of 2.7%. Monica says that she will earn more interest in 1 year because her interest te is higher. Is she correct? Justify your response. Monica is incorrect. Monica will earn $6.80 in 1 year while Paul will earn $8.40 in 1 year. Enter your answer in the edit fields and then click Check Answer. All parts showing (TE) ogress Clear All Check Answer
Answers
Monica is not correct. Monica will earn $13.50 in 1 year while Paul will earn $13.20 in 1 year.
Who would earn the higher interest?
Simple interest is a linear function of the amount deposited, the interest rate and the number of years.
Simple interest = amount deposited x interest rate x time
Interest earned by Monica = $400 x 0.033 x 1 = $13.20
Interest earned by Paul = $500 x 0.027 x 1 = $13.50
Difference in the interest = $13.50 - $13.20 = $0.30
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For an activity in class, the teacher gave each student a small card with a binomial on it. While music played for a few seconds students walked around the room. When the music stopped the students paired with the person nearest to them.
Elinor’s card had 3x + 4 on it. She paired first with Mike whose card showed −2x – 1. The teacher asked the students to add, subtract, and then multiply the binomials on their two cards together, and then to record the solutions on a white board. Which of the following could NOT be one of this pair of student’s answers?
5x + 3
x + 3
5x + 5
−6x2 – 11x – 4
Answers
The expression that was not found for the pair of students is given as follows:
5x + 3.
How to realize the operations?To add or subtract polynomials, we must combine the like terms on the polynomials.
The polynomials for this problem are given as follows:
3x + 4.-2x - 1.Hence the addition of these polynomials is given as follows:
3x + 4 - 2x - 1 = x + 3.
(addition keeps the signal of each term in the second polynomial).
The subtraction is given as follows:
3x + 4 + 2x + 1 = 5x + 5.
(subtraction changes the signal of each term in the second polynomial).
For the product, we multiply all terms then combine the like terms, hence:
(3x + 4)(-2x - 1) = -6x² - 3x - 8x - 4 = -6x² - 11x - 4.
5x + 3 is not a solution of any of the operations, hence it is the answer.
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If 5 + 4 = 9, does (5+4) divided bye 3 = 9 divided by 4? Why or why not?
Answers
(5+4) divided bye 3 is not equals 9 divided by 4
Define divisionDivision is a basic arithmetic operation used to find how many times one quantity is contained within another quantity. It involves splitting a number or quantity into equal parts or groups. The result of a division is called the quotient.
In division, the number being divided is called the dividend, the number by which it is divided is called the divisor, and the result is the quotient. For example, in the division problem 10 ÷ 2 = 5, 10 is the dividend, 2 is the divisor, and 5 is the quotient.
Given 5+4=9
To prove; (5+4) divided bye 3 = 9 divided by 4
Taking LHS,
(5+4) divided bye 3
=9/3
=3
Taking RHS,
9 divided by 4
=9/4
=2.25
LHS is not equal to RHS
Hence, given statement is false.
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