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3 years ago

15

Kathy bought a pair of satin heels for the prom. The shoes cost $17.99. She also bought a satin handbag for $9.99. It will cost

$4.50 to have the shoes dyed to match her prom dress. How much will Kathy spend altogether?

1 answer:

atroni [7]3 years ago

7 0

Answer:

$32.48

Step-by-step explanation:

Add all of the values

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Simplify: 6 to the the 6th power multiplied by 6 to the second power

Georgia [21]

1679616 that's the answer

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3 years ago

Nate’s classroom has three tables of different lengths. Of 4

Lina20 [59]

Answer:

Step-by-step explanation:

I think you need to multiply 4 1/2x3 and 2 1/2x4 and then when you get the answers for both you add them together hopefully this works

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3 years ago

What is the approximate distance between the points (-3, -4) and (-8, 1) on a coordinate grid

motikmotik

Answer:

$D= 7.071$

Step-by-step explanation:

Here we are given with two coordinates and asked to determine the distance between them.

Here we are going to use the distance formula, which is given as under

$D=\sqrt{(y_2-y_1)^2+(x_2-x_1)^2}$

Where

$(x_1,y_1) = (-3,-4))$

$(x_2,y_2) = (-8,1)$

Replacing these values in the distance formula

$D =\sqrt{(-8-(-3))^2+(1-(-4))^2}$

$D =\sqrt{(-8+3)^2+(1+4)^2}$

$D =\sqrt{(-5)^2+(5)^2}$

$D =\sqrt{25+25}$

$D =\sqrt{50}$

$D= 7.071$

Hence the Distance is 7.071 units

7 0

4 years ago

There are 2601 students in a school the teacher want them to stand in rows and columns and the number of the row and column are

steposvetlana [31]

Answer: 51

Step-by-step explanation:

From the question, we are informed that there are 2601 students in a school and that the teacher want them to stand in rows and columns.

Since the number of the row and column are equal, thus will go thus:

Let the number of row and column be represented by y. Therefore,

y × y = 2601

y² = 2601

y = ✓2601

y = 51

Therefore the rows and columns must be 51 each.

3 0

3 years ago

A researcher wishes to estimate with 95% confidence, the proportion of the people who own a home computer. A previous study show

vitfil [10]

Answer:

The minimum sample size necessary is 2305.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

For this problem, we have that:

$\pi = 0.4$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

The researcher wishes to be accurate within 2% of the true proportion. Find the minimum sample size necessary?

We need a sample size of n.

n is found when M = 0.02. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.02 = 1.96\sqrt{\frac{0.4*0.6}{n}}$

$0.02\sqrt{n} = 1.96*\sqrt{0.4*0.6}$

$\sqrt{n} = \frac{1.96*\sqrt{0.4*0.6}}{0.02}$

$(\sqrt{n})^{2} = (\frac{1.96*\sqrt{0.4*0.6}}{0.02})^{2}$

$n = 2304.96$

Rounding up

The minimum sample size necessary is 2305.

8 0

3 years ago