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3 years ago

8

YOU WILL GET A THANKS, 11 POINTS, INCLUDING A HAPPY STUDENT

2 answers:

Semmy [17]3 years ago

8 0

320 was the difference in Cheyenne's score

Darina [25.2K]3 years ago

7 0

The difference is 320

I got this by subtracting 420 and 100

420 - 100 = 320

Hope this helps

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If the coefficient of correlation is .8, then the percentage of variation in the dependent variable explained by the estimated r

Olegator [25]

Answer:

64%

Step-by-step explanation:

The percentage of variation in the dependent variable explained by the estimated regression is calculated with the coefficient of correlation as follows:

First, square the coefficient of correlation: 0.8^2 = 0.64

And then, multiply this result by 100, so that, it is expressed as a percentage: 0.64*100 = 64%

3 0

3 years ago

A washer and a dryer cost $1029 combined. The washer costs $79 more than the dryer. What is the cost of the dryer?

Darina [25.2K]

X = dryer
(X+79) = washer
X + (X+79) = $1029
Therefore, x+x+79= 1029 or 2x+79=1029
Solve for x

2x = 1029-79
2x = 950

2x/2 = 950/2

X= $475 The price of the dryer is $475

4 0

3 years ago

Read 2 more answers

An expression is shown below:

Alex73 [517]

Given:

The given expression is:

$6x^2y-3xy-24xy^2+12y^2$

To find:

Part A: The expression by factoring out the greatest common factor.

Part B: Factor the entire expression completely.

Solution:

Part A:

We have,

$6x^2y-3xy-24xy^2+12y^2$

Taking out the highest common factor 3y, we get

$=3y(2x^2-x-8xy+4y)$

Therefore, the required expression is $3y(2x^2-x-8xy+4y)$ .

Part B:

From part A, we have,

$3y(2x^2-x-8xy+4y)$

By grouping method, we get

$=3y(x(2x-1)-4y(2x-1))$

$=3y(x-4y)(2x-1)$

Therefore, the required factored form of the given expression is $3y(x-4y)(2x-1)$ .

3 0

3 years ago

Morgan painted 3 faces in 12 minutes at the Spring Festival. At this rate, how many faces can she paint

Naya [18.7K]

Answer:

A

Step-by-step explanation:

3 0

2 years ago

Consider the following cost function.

Makovka662 [10]

Answer:

a)Average cost function = $\bar{C(x)}=\frac{1000+0.1x}{x}$

Marginal cost function = $C'x=0.1$

b) $\bar{C(2000)}=0.6$

$C'(2000)=0.1$

c) $\bar{C(2000)}=0.6$ is the average cost to produce first 2000 items

C'(2000)=0.1 is the marginal cost to produce 2001 th item

Step-by-step explanation:

Cost function: $C(x) = 1000 + 0.1x$

a)Find the average cost and marginal cost functions.

Average cost function = $\bar{C(x)}=\frac{C(x)}{x}$

Average cost function = $\bar{C(x)}=\frac{1000+0.1x}{x}$

Marginal cost function = $C'x=0.1$

b) Determine the average and marginal cost when x = a.

a = 2000

Average cost function = $\bar{C(x)}=\frac{1000+0.1x}{x}=\frac{1000+0.1a}{a}=\frac{1000+0.1(2000)}{2000}=0.6$

So, $\bar{C(2000)}=0.6$

Marginal cost function = $C'(2000)=0.1$

c)Interpret the values obtained in part (b).

$\bar{C(2000)}=0.6$ is the average cost to produce first 2000 items

C'(2000)=0.1 is the marginal cost to produce 2001 th item

4 0

3 years ago