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3 years ago

Simplify -|-5 + 2|.

1 answer:

7 0

Hello,

The answer will be "-5+2".

Reason:

I These lines turn negative numbers into positive:

Therefore the answer will be -5+2 (since how the first - sign was outside of the I).

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit

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The formula for glue says add 45 mL of Hardner to each container of resin how much Hardner should be added to 18 containers of r

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Answer:

810 mL of hardener

Step-by-step explanation:

You need 45 mL of hardener for each container and you have 18 containers so:

45 x 18 = 810 mL

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3 years ago

Look at the figure. Classify the pair of angles: <2 and <7.

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Answer:

Same-side exterior angles

Step-by-step explanation:

Through the process of elimination it is not:

→ Corresponding angles as that would be 2 and 6

→ Same side interior angles as that would be 3 and 6 or 4 and 5

→ Alternate interior angles as that would be 6 and 4 of 3 and 5

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3 years ago

Scores on the math portion of the SAT are believed to be normally distributed and range from 200 to 800. A researcher from the a

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Using the z-distribution, it is found that she should take a sample of 46 students.

<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.

In this problem, we have a 95% confidence level, hence $\alpha = 0.95$ , z is the value of Z that has a p-value of $\frac{1+0.95}{2} = 0.975$ , so the critical value is z = 1.96.

Scores on the math portion of the SAT are believed to be normally distributed and range from 200 to 800, hence, by the Empirical Rule the standard deviation is found as follows:

$6\sigma = 800 - 200$

$6\sigma = 600$

$\sigma = 100$

The sample size is n when M = 29, hence:

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

$29 = 1.96\frac{100}{\sqrt{n}}$

$29\sqrt{n} = 196$

$\sqrt{n} = \frac{196}{29}$

$(\sqrt{n})^2 = \left(\frac{196}{29}\right)^2$

n = 45.67.

Rounding up, a sample of 46 students should be taken.

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

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2 years ago

A pitcher contains 2 liters of liquid. Jin pours 368 milliliters of this liquid into a test tube.

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Answer:

1,632 liters of liquid remain in the pitcher.

Step-by-step explanation:

Given that a pitcher contains 2 liters of liquid, and Jin pours 368 milliliters of this liquid into a test tube, to determine how much liquid is left in the pitcher the following calculation must be performed:

368 milliliters = 0.368 liters

2 - 0.368 = X

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Therefore, 1,632 liters of liquid remain in the pitcher.

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3 years ago

Hannah went to a hospital and donated 1.9 cups of blood. If there are

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Answer:

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2 years ago