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3 years ago

A dress costs $63. If the store is having a 20% off sale how much does the dress cost now

1 answer:

6 0

50.4$. All you have to do is multiply 63 by 0.20 ( which is another form on 20% h

63 x 0.20 would give us 12.6

Now you want to subtract that 12.6 from 63,

This will give you 50.4$ :)

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Equivalent expression for 4(a+5) by modeling and using distributive property

Harlamova29_29 [7]

Answer:

Step-by-step explanation:

to use distributive property

you have to put the 4 inside the paranthese and multiply

4a+20 is your answer

pls mark me brainliest

5 0

3 years ago

Read 2 more answers

How large a sample should be selected to provide a 95% confidence interval with a margin of error of 6? Assume that the populati

marshall27 [118]

Using the z-distribution, it is found that a sample of 171 should be selected.

<h3>What is a z-distribution confidence interval?</h3>

The confidence interval is:

$\overline{x} \pm z\frac{\sigma}{\sqrt{n}}$

The margin of error is:

$M = z\frac{\sigma}{\sqrt{n}}$

In which:

$\overline{x}$ is the sample mean.

z is the critical value.

n is the sample size.

$\sigma$ is the standard deviation for the population.

For this problem, the parameters are:

$z = 1.96, \sigma = 40, M = 6$

Hence we solve for n to find the needed sample size.

$M = z\frac{\sigma}{\sqrt{n}}$

$6 = 1.96\frac{40}{\sqrt{n}}$

$6\sqrt{n} = 40 \times 1.96$

$\sqrt{n} = \frac{40 \times 1.96}{6}$

$(\sqrt{n})^2 = \left(\frac{40 \times 1.96}{6}\right)^2$

n = 170.7.

Rounding up, a sample of 171 should be selected.

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

4 0

2 years ago

I have 2 possible answer, but I don't know which one. Help please.

stira [4]

Answer:

X=120

Step-by-step explanation:

It is an equalateral so all the angles in the middle are the same all being 60

The angle of a straight line is 180

So just minus 60 from 180 to get 120

180-60=120

5 0

3 years ago

Read 2 more answers

5/6+2 3/4 (it is a faction)

frosja888 [35]

Answer: the answer would be 3 7/12

Step-by-step explanation:

First you must find the common denominator(which is 12) and then add the fractions

4 0

3 years ago

And I’m back lol. Or did I never leave to begin with?-

Marianna [84]

Answer:

61 is ur answer

Step-by-step explanation:

Since this was a 90 degree angle you would just subtract 29 from the 90 degrees and get your answer.

7 0

3 years ago