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3 years ago

PLS HELP!! 10PTS!! I WILL MAKE YOU BRAINLIEST.

Mathematics

2 answers:

denpristay [2]3 years ago

3 0

Step-by-step explanation:

here are the answers

I hope this help, good luck

Ulleksa [173]3 years ago

3 0

A. a^3+3a^2+3a+1+x^3
b. 37a^6-a^3+3a^2b-3ab^2+b^3
c. (2x^3+x^2-2xy+y^2)•(4x^6-2x^5+4x^4y-2x^3y^2+(x-y)^4)

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Sam sold a car for 5299.00 his commission of 31% of the sale. What is his commission

Ierofanga [76]

Answer:

His commission is 1642.69

Step-by-step explanation:

31/100=x/5299

Cross multiply

164,264/100=100x/100

1642.69=x

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3 years ago

Find the radius of the circle if the center is at (1, 2) and the point (-3, 4) lies on the circle.

Anton [14]

Answer:

2√5

Step-by-step explanation:

The radius is the distance from the center to a point anywhere along the edge of the circle. To find the distance between these two points, use the distance formula.

$d = \sqrt{(x_2-x_1)^2 + (y_2-y_1)^2} \\d = \sqrt{(1--3)^2 + (2-4)^2}\\ d = \sqrt{4^2 + -2^2}\\ d = \sqrt{16 + 4}\\ d = \sqrt{20} \\d = 2\sqrt{5}$

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4 years ago

Read 2 more answers

According to the U.S. Census Bureau, 42% of men who worked at home were college graduates. In a sample of 480 women who worked a

Likurg_2 [28]

Answer:

1) $0.327 - 0.539 \sqrt{\frac{0.327(1-0.327)}{480}}=0.315$

The point estimate for the proportion of college graduates among women who work at home is 0.327

2) $0.327 - 0.539 \sqrt{\frac{0.327(1-0.327)}{480}}=0.315$

$0.327 + 0.539 \sqrt{\frac{0.327(1-0.327)}{480}}=0.339$

The 80% confidence interval is given by (0.315; 0.339)

Step-by-step explanation:

For this case we have the following info given:

$X = 157$ represent the women who worked at home who were college graduates

$n = 480$ the sample size selected

Part 1

In order to find the proportion of college graduates among women who work at home and we can use the following formula:

$\hat p=\frac{X}{n} = \frac{157}{480}= 0.327$

The point estimate for the proportion of college graduates among women who work at home is 0.327

Part 2

Construct an 80% confidence interval for the proportion of women who work at home who are college graduates. Round the answer to three decimal places. An 80% confidence interval for the proportion of women who work at home Is < p <

The confidence interval for the true proportion would be given by this formula

$\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}$