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3 years ago

Use the dropdown to complete the following inequality.

Mathematics

1 answer:

bazaltina [42]3 years ago

6 0

Answer:

Step-by-step explanation:

b is clearly negative

- - = +

so therefore, subtracting the negative will result in a larger answer than adding a small positive to a negative

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What is the area of the polygon H(3, 2), I(5, 2), J(5, 7), K(3, 7)

kobusy [5.1K]

Answer:

area = 10

Explanation:

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3 years ago

What’s 40% of 60 17 of 50 as well

yan [13]

Answer: 24; 8.5

Step-by-step explanation:

40% of 60

Move the decimal twice

4*6= 24

17% of 50

Move decimal and multiply

0.17*50= 8.5

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3 years ago

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A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the

lara31 [8.8K]

Answer:

The sample size is 1875.

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:

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

Sampling error of 0.03.

This means that $M = 0.03$

99.74% confidence level

So $\alpha = 0.0026$ , z is the value of Z that has a pvalue of $1 - \frac{0.0026}{2} = 0.9987$ , so $Z = 3$ .

25% of all adults had used the Internet for such a purpose

This means that $\pi = 0.25$

What is the sample size

The sample size is n. So

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

$0.03 = 3\sqrt{\frac{0.25*0.75}{n}}$

$0.03\sqrt{n} = 3\sqrt{0.25*0.75}$

Simplifying by 0.03 both sides

$\sqrt{n} = 100\sqrt{0.25*0.75}$

$(\sqrt{n})^2 = (100\sqrt{0.25*0.75})^2$

$n = 1875$

The sample size is 1875.

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3 years ago

Find the area of the given triangles.

UNO [17]

Answer:

There's only one triangle, so Ill work with that.

A formula for a triangle is 30 x 75 x 1/2.

You can first multiply 30 and 75, or you can first use the 1/2 on 30.

15 x 75 = 1125

A: 1125.

Hoped this helped.

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3 years ago

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serious [3.7K]

Answer:

Hello?

Step-by-step explanation:

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3 years ago

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