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3 years ago

Select True or False to correctly classify each inequality.

Mathematics

1 answer:

Ksivusya [100]3 years ago

3 0

<h2>Answer:</h2>

1. FALSE

2. TRUE

3. FALSE

4. TRUE

<h2>Step-by-step explanation:</h2>

6≤-6 = False

-3<3 = True

2.9>2.9 = False

4.5≥4.5 = True

I Hope That This Helps You GOOD LUCK

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What is the solution for 1/2+x=5/4

prohojiy [21]

1/2-(5/4) = x+1/4 // - x+1/4

1/2-x-(5/4)-(1/4) = 0

1/2-x-5/4-1/4 = 0

-x-1 = 0 // + 1

-x = 1 // * -1

x = -1

x = -1

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3 years ago

An automobile manufacturer would like to know what proportion of its customers are not satisfied by the service provided by the

zheka24 [161]

Answer:

The sample size needed if the margin of error of the confidence interval is to be about 0.04 is 18.

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:

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

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 $Z = 1.96$ .

Past studies suggest this proportion will be about 0.15

This means that $p = 0.15$

Find the sample size needed if the margin of error of the confidence interval is to be about 0.04

This is n when M = 0.04. So

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

$0.04 = 1.96\sqrt{\frac{0.15*0.85}{n}}$

$0.04\sqrt{n} = 1.96\sqrt{0.15*0.85}$

$\sqrt{n} = \frac{1.96\sqrt{0.15*0.85}}{0.04}$

$(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.15*0.85}}{0.04})^{2}$

$n = 17.5$

Rounding up

The sample size needed if the margin of error of the confidence interval is to be about 0.04 is 18.

8 0

3 years ago

Giả sử phương án tối ưu của bài toán mở rộng là x* = (-2,-3,0,1,2) với x5 là ẩn giả. Tìm phương án tối ưu xuất phát của bài toán

arlik [135]

Answer:

ask in English then I can help u

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Anettt [7]

So basically i think you would 1,200*3.9%=46.8
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