PLEASE HELP ITS URGENT I INCLUDED THE GRAPH AND WROTE THE PROBLEM DOWN ITS THE IMAGE I HAVE ATTACHED!!!

From the conversion of units using conversion factor, the real diameter of venus planet when model diameter 12.1 cm is equals to the 1200 kilometres.

We have Willam will build a planetary path for people to walk through the planetary path. He has two different scales for measurement. According to Scenario, he use 1 cm to 1000 km for representing the diameter of each planet. Also 1 m to 1000000 km for representing distance of the sun to each planet. We have to determine the diameter of venus .

Now, diameter of planet Venus in the model = 12.1 cm

As we have he use 1 cm in place of 1000 km. So, conversion factor for diameter from model to real is written as 1 cm = 1000 km. Therefore, real diameter of planet = 12.1 × 1000 km = 1200 km. Hence, required value is 1200 km.

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Step-by-step explanation:

an = 7 + 2(n-1)

   or     an =  5 + 2n

a. The total number of possible committees is [tex]{10\choose 4} \times {14\choose 3} = 1001 \times 364 = 364364[/tex].

b. The number of committees on which the specific man and woman who refuses to serve on the committee are [tex]{8\choose 3} \times {9\choose 4} = 5040[/tex].

c. There are a limited number of combinations in which no two ladies are consecutive that is  [tex]4! \times {4\choose 3} 3! = 288[/tex].

(a) To form a committee of 7 people from 10 men and 9 women, we can choose 4 men out of 10 in [tex]{10\choose 4}[/tex] ways, and choose 3 more people from the remaining 5 men and 9 women in [tex]{14\choose 3}[/tex] ways. Therefore, the total number of possible committees is [tex]{10\choose 4} \times {14\choose 3} = 1001 \times 364 = 364364[/tex].

(b) If 1 woman refuses to be on the committee with a particular man, we can count the number of committees that do not include that particular man and that woman, and subtract that number from the total number of possible committees.

There are [tex]{9\choose 1}[/tex] ways to choose the woman who refuses to be on the committee with the particular man, and [tex]{8\choose 3}[/tex] ways to choose the remaining 3 women. There are [tex]{9\choose 4}[/tex] ways to choose 4 men out of the 9 remaining men.

Therefore, the number of committees that include the particular man and the woman who refuses to be on the committee is [tex]{8\choose 3} \times {9\choose 4} = 5040[/tex]. The total number of possible committees is [tex]{10\choose 4} \times {9\choose 3} = 12600[/tex]. Thus, the number of possible committees that do not include the particular man and the woman who refuses to be on the committee is 12600 - 5040 = 7560.

(c) There are [tex]{10\choose 4}[/tex] ways to choose 4 men out of the 10 men, and {9\choose 3} ways to choose 3 women out of the 9 women. The total number of possible ways to form a committee of 4 men and 3 women is [tex]{10\choose 4} \times {9\choose 3} = 12600[/tex]. To calculate the probability that no women are next to each other in the queue, we can count the number of arrangements where no two women are consecutive and divide it by the total number of possible arrangements. We can arrange the 4 men in a line in 4! ways, and arrange the 3 women in the 4 spaces between the men in [tex]{4\choose 3} 3![/tex] ways. Therefore, the number of arrangements where no two women are consecutive is [tex]4! \times {4\choose 3} 3! = 288[/tex]. The probability that no women are next to each other in the queue is 288/12600 = 0.0229, or about 2.29%.

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The financial statements accurately reflect the economic reality of the transaction and the carrying value of the non-current assets.

Issue 1:

Equity accounts are used in intragroup transactions to eliminate the effect of transactions between the parent and subsidiary companies when preparing consolidated financial statements. One example of using an equity account is when the parent company sells inventory to its subsidiary at a higher price than its cost. In this case, the subsidiary will record the inventory at the higher purchase price, resulting in a higher cost of goods sold and a lower profit. To eliminate this effect, an equity account called "Elimination of Unrealized Profit on Inventory" is created. Another example is when the parent company loans money to its subsidiary at a lower interest rate than the market rate. In this case, the subsidiary will record the loan at the lower interest rate, resulting in a lower interest expense and a higher profit. To eliminate this effect, an equity account called "Elimination of Unrealized Interest Income" is created.

Issue 2:

Even if the Parent company sells inventory to the Subsidiary company and sells 100% of this inventory to an external party by financial year-end, an elimination entry is still needed to eliminate the intragroup transaction. The elimination entry would involve the removal of the inventory sold to the subsidiary from the parent company's inventory account and the elimination of the corresponding payable from the subsidiary's account. The entries would look like this:

Parent's worksheet entry:

Inventory decrease: Debit

Elimination of intercompany payable: Credit

Subsidiary's worksheet entry:

Elimination of intercompany receivable: Debit

Cost of goods sold increase: Credit

Issue 3:

When a non-current asset is sold within the group, there is a need to adjust the depreciation and accumulated depreciation accounts to reflect the correct carrying value of the asset. This is because the carrying value of the asset at the time of sale is likely to be different from the original cost of the asset due to depreciation. The adjustment is made by removing the accumulated depreciation on the asset being sold and removing the cost of the asset from the balance sheet. The resulting gain or loss on the sale is then recorded separately. The tax effects of the gain or loss on the sale are also recorded separately. The entries would look like this:

Remove the sold asset from the balance sheet:

Accumulated depreciation: Debit

Asset cost: Debit

Gain or loss on sale: Credit

Record the tax effects:

Deferred tax liability or asset: Debit or Credit

Income tax expense: Credit or Debit

Gain or loss on sale: Credit or Debit

The adjustments to depreciation and accumulated depreciation are necessary to ensure that the financial statements accurately reflect the economic reality of the transaction and the carrying value of the non-current assets.

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To evaluate the expressions for z = 1 + i, we'll consider each part:

(a) zz (the product of z and its complex conjugate):
First, find the complex conjugate of z, which is the same as z but with the imaginary part negated: z* = 1 - i. Now, multiply z and z*:
z * z* = (1 + i)(1 - i) = 1 - i + i - i^2 = 1 - i^2 = 1 - (-1) = 1 + 1 = 2.

(b) Re(z) + Im(z) Z^2 + 2:
Re(z) is the real part of z, which is 1. Im(z) is the imaginary part of z, which is 1. Now, square z:
Z^2 = (1 + i)^2 = 1 + 2i + i^2 = 1 + 2i - 1 = 2i.
Finally, calculate Re(z) + Im(z) Z^2 + 2:
1 + 1(2i) + 2 = 1 + 2i + 2 = 3 + 2i.

So, the expressions evaluated are (a) zz = 2 and (b) Re(z) + Im(z) Z^2 + 2 = 3 + 2i.

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Answer:

72r^3t^4

Step-by-step explanation:
* and x = times tables btw

First you'll want to rewrite the equation:
12r^3
18r^2t
24t^4

Then factor the monomial, 12r^3=2*2*3*r*r*r
18r^2t
24t^4

Finding the lease common multiple of the expressions, write the product of all factors the greatest number of times they appear in factorization.

12r^3=2*2*3*r*r*r
18r^2t=2*3*3*r*r*t
24t^4=2*2*2*3*t*t*t*t
Your answer is
2 x 2 x 2 x 3 x 3 x r x r x r x t x t x t
simplify it and you get
72r^3t^4

Answer:

[tex]\Large \boxed{\boxed{\textsf{$7x+6y$}}}[/tex]

Step-by-step explanation:

To simplify this expression, we can 'collect like terms'. This is a way of simplifying algebraic expressions that involves combining terms with the same base pronumeral, and adding or subtracting them together.

First, we might start by rearranging the expression to make it more convenient:

[tex]\large \textsf{$4x+3x+7y-y$}[/tex]

Now, we collect the like terms:

[tex]\large \textsf{$7x+6y$}[/tex]

[tex]\large \textsf{$\therefore$ the simplified expression is: $\boxed{7x+6y}$}[/tex]

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The standard deviation of this sample of red blood cell counts is approximately 2.28.

To calculate the standard deviation of a sample, you can use the formula:

S = sqrt((Σ(xi - x)^2)/(n-1))

where:

Σ is the sum of

xi is the i-th data point

x is the sample mean

n is the sample size

So, for this sample of red blood cell counts:

n = 6

Σxi = 53 + 49 + 54 + 51 + 48 + 51 = 306

x = Σxi / n = 306 / 6 = 51

Now, we need to calculate Σ(xi - x)^2:

(53 - 51)^2 = 4

(49 - 51)^2 = 4

(54 - 51)^2 = 9

(51 - 51)^2 = 0

(48 - 51)^2 = 9

(51 - 51)^2 = 0

Σ(xi - x)^2 = 4 + 4 + 9 + 0 + 9 + 0 = 26

Now we can plug in these values to the formula for S:

S = sqrt((Σ(xi - x)^2)/(n-1)) = sqrt((26)/(6-1)) = sqrt(5.2) ≈ 2.28

So the standard deviation of this sample of red blood cell counts is approximately 2.28.

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To turn on light 1, switches A, B, C, and D must all be on.

To determine which switches must be on for light 1 to function, we need to trace the path of the circuit from the battery to light 1 and see which switches need to be closed to complete the circuit.

Since this is a parallel circuit, the current can flow through multiple paths, and each light can have its own path to the battery. So, we need to identify the path that leads to light 1.

Starting at the battery, there are two paths that branch off, one leading to switch A and the other leading to switch B. Both switches must be closed for the current to flow through their respective paths.

From switch A, the current flows through light 2 and then to switch C. If switch C is open, then the current cannot flow to light 1. Therefore, switch C must be closed for light 1 to function.

From switch B, the current flows through light 3 and then to switch D. If switch D is open, then the current cannot flow to light 1. Therefore, switch D must be closed for light 1 to function.

Therefore, to turn on light 1, switches A, B, C, and D must all be on.

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We can make 4 servings of chicken noodle soup using 20 oz of egg noodles.

To determine how many servings of chicken noodle soup can be made from 20 oz of egg noodles, we need to divide the total amount of noodles by the amount required for each serving.

Given that 5 oz of egg noodles are needed for one serving, we can divide 20 oz by 5 oz/serving to get the total number of servings.

20 oz ÷ 5 oz/serving = 4 servings

The serving size may vary depending on the recipe and the individual's appetite, so this calculation is an estimate. Other ingredients such as chicken, vegetables, and broth will also affect the overall serving size and number of servings.

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Step-by-step explanation:

On Saturday, out of ( 370 + 433 + 465 = 1268)  ,   465 went to F&L

 465/1268   is the fraction that wen to F&L

      you might expect this fraction of 1500 to go there on Sunday

            1500  * 465/1268 =   550 people

Answer: B

Step-by-step explanation:

The frequency of this wave is 1 s⁻¹.

Since, We know that;

Frequency describes the number of waves that pass a fixed place in a given amount of time.

Given that;

A coiled spring with coils that are closely spaced then widely then closely then widely then closely, ending with a yellow line labeled 1 second.

We know that -

Frequency = 1 / Time period

f = 1/T

f = 1/1

f = 1 s⁻¹

Therefore, the frequency of this wave is 1 s⁻¹.

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If the population of the city in 2010 was 2 million and is growing at the rate of 0.5% a year. The population of the city n years after 2010 is equal to 1.005^n (2). The correct answer is 2nd option.

The population of the city in 2010 was 2 million and is growing at the rate of 0.5% a year. We need to find the population of the city n years after 2010.

The formula to calculate the population after n years is:

Population = Initial Population * (1 + growth rate)^n

In this case, the initial population is 2 million and the growth rate is 0.5% (or 0.005 in decimal form).

So the formula for the population n years after 2010 is:

Population = 2 * (1 + 0.005)^n

Simplifying the expression:

Population = 2 * (1.005)^n

Population = (1.005)^n(2)

Therefore,  the population of the city n years after 2010 is equal to (1.005)^n(2).

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In the given right triangle ABC with an altitude BD drawn to hypotenuse AC and BD = 2 and DC = 1, the length of AD is √(17)/2.

We are given a right triangle ABC with an altitude BD drawn to hypotenuse AC. We are also given that BD = 2 and DC = 1, and we need to find the length of AD.

To find the length of AD, we can use the Pythagorean theorem, which states that in a right triangle, the sum of the squares of the two shorter sides (the legs) is equal to the square of the length of the hypotenuse.

In this case, we have

AB² + BD² = AD² (using the Pythagorean theorem for triangle ABD)

AC² - DC² = AD² (using the Pythagorean theorem for triangle ADC)

Since we know that AB + BC = AC, we can rewrite the second equation as

AB² + 2AB*BC + BC² - DC² = AD²

Substituting BD = 2 and DC = 1, we get

AB² + 4 = AD² (from the first equation)

AB² + 2AB*BC + BC² - 1 = AD² (from the second equation)

Subtracting the first equation from the second equation, we get

2AB*BC + BC² - 3 = 0

Solving for BC using the quadratic formula, we get

BC = (-2 ± √(16))/2 = -1 or -3

Since BC cannot be negative, we have BC = -1.

Substituting this value into the equation 2AB*BC + BC² - 3 = 0, we get

-2AB - 1 = 0

Solving for AB, we get

AB = -1/2

Substituting AB = -1/2 and BD = 2 into the equation AB² + 4 = AD², we get

(1/4) + 4 = AD²

Simplifying, we get

AD² = 17/4

Taking the square root of both sides, we get

AD = √(17)/2

Therefore, the length of AD is √(17)/2.

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The first statement will be: Write each equation in slope-intercept form.

If we need to see if the lines are perpendicular or parallel or are intersecting, we need to check the slope first for that we need to convert the given equation of the line in slope-intercept form.

Therefore, it should be the first step to write the equation in slope-intercept form.

Hence, the first statement will be: Write each equation in slope-intercept form.

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The appropriate correlation coefficient for the following data is given by 0.95, option D.

A statistical indicator of the strength of a linear link between two variables is the correlation coefficient. Its values might range from -1 to 1. According to a correlation coefficient of 1, which indicates a completely negative or inverse association, values in one series increase as those in the other decline, and vice versa. A straight and completely positive relationship has a value of 1. When the correlation coefficient is 0, there is no linear relationship.

In both science and finance, correlation coefficients are used to measure the degree of relationship between two variables, components, or data sets. For instance, one may infer that there is a large positive connection between oil prices and forward returns on oil stocks since high oil prices are advantageous for crude producers. Based on market data, the correlation coefficient for these variables shows a modest and erratic association over long periods of time.

x = 9, 16, 24, 12, 5, 14

y = 6, 7, 10, 5, 2, 8

[tex]\mu_x[/tex] = 84/6 = 14

[tex]\mu_y[/tex]= 38/6 = 6.33

[tex]\sigma_x=\sqrt{\frac{\sum (x_i-\mu_x)^2}{n} }[/tex] = [tex]\sqrt{\frac{230}{6} } =6.1914[/tex]

[tex]\sigma_y=\sqrt{\frac{\sum (y_i-\mu_y)^2}{n} }[/tex] = [tex]\sqrt{\frac{37.33}{6} } =2.4944[/tex]

[tex]P_x_y=\frac{1}{n} [\frac{\sum(x_i-\mu_x)(y_i-\mu_y)}{\sigma_x.\sigma_y} ][/tex]

= 88/92.6643

= 0.9497

[tex]P_{xy}[/tex] = 0.95.

Therefore,  correlation coefficient for the following data is 0.95.

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Complete question:

Calculate the appropriate correlation coefficient for the following data. Participant Number of Books Read (Y) 2 3 4 Reading Speed Test Score (X) 9 16 24 12 5 18 6 7 10 5 2 8 5 6 O a. +0.49 O b. +0.23 OC -0.07 O d. +0.95

The correlation coefficient is calculated using the formula: r = (sum of the products of deviations from the mean) / ((n - 1) * Sx * Sy).

To calculate the correlation coefficient (r) for the given data, we first need to calculate the mean and standard deviation for both x and y, as well as the sum of the products of deviations from the mean.

x: reading speed test score

y: number of books read

n = 6

Mean of x (reading speed test score):

(x1 + x2 + x3 + x4 + x5 + x6) / n = (9 + 16 + 24 + 12 + 5 + 18) / 6 = 13.33

Mean of y (number of books read):

(y1 + y2 + y3 + y4 + y5 + y6) / n = (6 + 7 + 8 + 5 + 2 + 8) / 6 = 6.0

Standard deviation of x:

Sx = sqrt(((x1 - mean_x)^2 + (x2 - mean_x)^2 + ... + (x6 - mean_x)^2) / (n - 1))

= sqrt(((9 - 13.33)^2 + (16 - 13.33)^2 + ... + (18 - 13.33)^2) / 5)

= 6.27

Standard deviation of y:

Sy = sqrt(((y1 - mean_y)^2 + (y2 - mean_y)^2 + ... + (y6 - mean_y)^2) / (n - 1))

= sqrt(((6 - 6)^2 + (7 - 6)^2 + ... + (8 - 6)^2) / 5)

= 1.58

Sum of the products of deviations from the mean:

((x1 - mean_x) * (y1 - mean_y)) + ((x2 - mean_x) * (y2 - mean_y)) + ... + ((x6 - mean_x) * (y6 - mean_y))

= ((9 - 13.33) * (6 - 6)) + ((16 - 13.33) * (7 - 6)) + ... + ((18 - 13.33) * (8 - 6))

= 100.67

Now, we can use the formula for the correlation coefficient:

r = (sum of the products of deviations from the mean) / ((n - 1) * Sx * Sy)

r = 100.67 / ((6 - 1) * 6.27 * 1.58) = 0.846

Therefore, the correlation coefficient (r) for the given data is approximately 0.846.

The closest option given is 0.85, so we can choose option d. 0.85 as our answer.

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The volume of a cylinder as per given values is 102 cubic feet.

Length of the pipe of the cylinder = 12ft

Diameter of the pipe of the cylinder = 3ft.

Thus,

Radius will be -

r = diameter / 2

= 3 ft / 2 = 1.5 ft

The three-dimensional form of a cylinder is made up of two parallel circular bases connected by a curving surface. The right cylinder is created when the centres of the circular bases cross each other.

Using the formula for the volume of a cylinder

[tex]V = πr^2h[/tex]

Substituting the values -

[tex]V = π(1.5 ft)^2 x 12 ft[/tex]

Using the value of π as approximately 3.14

V = 3.14 x (1.5)² x 12 ft

V = 101.79 or 102.

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Answer:

Step-by-step explanation:

2)x= -19  

3) a= -8  

4) x=8

5)x=4

6)n=13

7) k=0

8) p=17

9) b=15

10)n= -19

To use Pascal's triangle to expand these expressions, we need to first write out the coefficients of each term in the expansion.

a) To expand (3x – 4)^n, we can use the nth row of Pascal's triangle, where the first term is 1 and each subsequent term is the sum of the two terms directly above it. For example, the third row of Pascal's triangle is: 1 2 1
So the expansion of (a + b)^3 is:
1a^3 + 3a^2b + 3ab^2 + 1b^3
Using this same pattern, we can expand (3x – 4)^n by using the nth row of Pascal's triangle as the coefficients. For example, to expand (3x – 4)^2, we use the second row of Pascal's triangle: 1 2 1
So the expansion is:
1(3x)^2 + 2(3x)(-4) + 1(-4)^2
Simplifying this gives:
9x^2 - 24x + 16
b) To expand (2x + 3y)^n, we can use the nth row of Pascal's triangle again. This time, the first term will be (2x)^n and the second term will be (3y)^0 = 1. The third term will be (2x)^(n-1)(3y)^1, and so on. For example, to expand (2x + 3y)^3, we use the third row of Pascal's triangle: 1 3 3 1
So the expansion is:
1(2x)^3 + 3(2x)^2(3y) + 3(2x)(3y)^2 + 1(3y)^3
Simplifying this gives: 8x^3 + 36x^2y + 54xy^2 + 27y^3

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Answer:

see explanation

Step-by-step explanation:

A

3x² + 36x ← factor out common factor of 3x from each term

= 3x(x + 12)

B

- 36x - 4x² ← factor out common factor of - 4x from each term

= - 4x(9 + x)

This means there must be a mistake in the given range or values. It's possible that the lower limit should be negative instead of 0, or that there is a typo in one of the values.

To find the probability of a standard normal distribution occurring in a given region, we need to use the standard normal distribution table. The table provides the area to the left of a given z-score.

In this case, we are given a range of z-scores, which is from 0 to 1.44. We want to find the probability of a standard normal distribution occurring in this range.

To use the table, we first find the area to the left of the upper limit of the range, which is 1.44. This value can be found in the first column of the table, under the row labeled 1.4 and the column labeled 0.04. The value in this cell is 0.4251.

Next, we find the area to the left of the lower limit of the range, which is 0. This value can be found in the first column of the table, under the row labeled 0 and the column labeled 0.00. The value in this cell is 0.5000.

To find the probability of a standard normal distribution occurring in the given range, we subtract the area to the left of the lower limit from the area to the left of the upper limit. That is:

P(0 < z < 1.44) = P(z < 1.44) - P(z < 0)

= 0.4251 - 0.5000

= -0.0749

The result is negative, which is not possible since probabilities are always between 0 and 1. This means there must be a mistake in the given range or values. It's possible that the lower limit should be negative instead of 0, or that there is a typo in one of the values.

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The width of the river (AB) is approximately 265.85 meters.

We have to solve this using the tangent formula

Tan(angle) = opposite side / adjacent side

In this case:

tan(28°) = AB / BC

We know that BC = 500 m.

So, we can write the equation as:

tan(28°) = AB / 500

To get AB we would have to cross multiply the equation

Now, we can solve for AB:

AB = 500 * tan(28°)

Using a calculator we will have

AB = 500 * 0.5317

AB = 265.85

So, the width of the river (AB) is approximately 265.85 meters.

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The simplified expression includes the terms 3x2-28x+49 3x2–7x is  -21x + 49.


To simplify the expression, follow these steps:

Distribute the negative sign across the terms within the parentheses: 3x^2 - 28x + 49 - 3x^2 + 7x.

Combine like terms:
- (3x^2 - 3x^2) = 0x^2
- (-28x + 7x) = -21x
- (+49) = 49

Write the simplified expression: 0x^2 - 21x + 49.

Since 0x^2 is just 0, you can omit it from the expression. So the final simplified expression is: -21x + 49.

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The factor by which the surface area of the figure increased is 4.

Surface area is the sum of all the surfaces on each side of a three-dimensional shape.

To calculate the factor by which the surface area of the figure increased, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the correct answer is B. 4

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A property which explains that 20 × 25 = 25 × 20 include the following: B. Commutative property.

In Mathematics and Geometry, the Commutative Property of Multiplication states that when three (3) numbers are multiplied, the end result (output) would always be the same regardless of the way the numbers are arranged and grouped.

This ultimately implies that, re-arranging or regrouping the order of numbers that are being multiplied does not change the end result (output) or product in accordance with the Commutative Property of Multiplication.

Mathematically, the Commutative Property of Multiplication is represented by this mathematical equation:

a · (b) = b · (a)

20 × 25 = 25 × 20

500 = 500 (True).

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Complete Question:

What property explains that 20x25 = 25x20

Associative property

Commutative property

Distributive property

A graph that shows the line y = –3/4 x + 1 is: A. The graph with the X-coordinate marks -4, -2, 0, 2, and 4. The Y-coordinate mark -4, -2, 0, 2, and 4. There is line which intersects y-axis at (0, 1) and x-axis at (3, -3).

In Mathematics and Geometry, the point-slope form of a straight line can be calculated by using the following mathematical expression:

y - y₁ = m(x - x₁)

Where:

First of all, we would determine the slope of this line;

Slope (m) = (y₂ - y₁)/(x₂ - x₁)

Slope (m) = (3 - 0)/(-3 - 1)

Slope (m) = -3/4

At data point (0, 1) and a slope of -3/4, a linear equation for this line can be calculated by using the point-slope form as follows:

y - y₁ = m(x - x₁)

y - 1 = -3/4(x - 0)  

y = -3x/4 + 1

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Complete Question;

Which graph shows the line y = –3/4 x + 1?

since we don't have the value for b, we can't calculate the estimate for σ2.

a) Here is the complete ANOVA table:

b) To test the equality of the yield resulting from each of the 4 fertilizers, we can use the F-test. The null hypothesis is that the mean yield for all fertilizers is equal, and the alternative hypothesis is that at least one mean yield is different. The test statistic is the ratio of the mean square for the Fertilizer source of variation to the mean square for the Residuals source of variation:

F = (a/c-d) / (b/36)

We need to compare this F value to the critical F value at a significance level of alpha = 0.05 with degrees of freedom (3,36) from the ANOVA table or using a calculator. If the calculated F value is greater than the critical F value, we reject the null hypothesis and conclude that at least one mean yield is different.

Unfortunately, we don't have enough information to calculate the F value since we only have the sum of squares for the Fertilizer and Residuals sources of variation, not the actual values for a, b, c, and d.

c) To estimate the common variance σ2, we can use the mean square for the Residuals source of variation, which is b/36. Therefore, the estimate for the common variance is:

σ2 = b/36

However, since we don't have the value for b, we can't calculate the estimate for σ2.

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Answer:

A. The correct answer is B, the point where the most profit is made.

B. The correct answer is B, the price per pen where no profit is made.

C.

[tex]m = \frac{120 - 0}{3 - 6} = - \frac{120}{3} = - 40[/tex]

When the price of a pen increases by one dollar, the profit decreases by $40.

D. The domain of this graph given the situation is 0 < x < 6 because there is no profit (there is a loss) beyond those points.

To find the equation of a line that is perpendicular to another line, we need to use the fact that the slopes of perpendicular lines are negative reciprocals of each other. So the equation of the line passing through (-4,3) and perpendicular to 1x + 3y = 5 is y = 3x + 15.

First, we need to find the slope of the given line. We can rearrange the equation 1x + 3y = 5 to get it in slope-intercept form (y = mx + b), where m is the slope and b is the y-intercept.

1x + 3y = 5

3y = -1x + 5

y = (-1/3)x + 5/3

So the slope of the given line is -1/3.

To find the slope of the line we want to write the equation for, we know that it must be the negative reciprocal of -1/3. So:

slope of perpendicular line = -1/(-1/3) = 3

Now we have the slope of the perpendicular line and a point it passes through (-4,3), so we can use point-slope form to write the equation:

y - y1 = m(x - x1)

where m is the slope we just found (3) and (x1, y1) is the given point (-4,3).

y - 3 = 3(x - (-4))

y - 3 = 3(x + 4)

y - 3 = 3x + 12

y = 3x + 15

So the equation of the line passing through (-4,3) and perpendicular to 1x + 3y = 5 is y = 3x + 15.

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