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3 years ago

Perform the indicated operation.

Mathematics

2 answers:

bulgar [2K]3 years ago

8 0

-20. -100/5 is -20. You could have used a calculator to find this.

Valentin [98]3 years ago

4 0

When dividing a fraction in which the top OR the bottom is negative, the answer is negative. Next, just solve normally. 100/5=20
If you want to check, 20*5=100.
Remember to make the answer negative, so the answer is -20.<span />

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Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

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In this problem, we have that:

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a) Find the z-score of John who scored 190

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$Z = -0.8$

b) Find the z-score of Bill who scored 270

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{270 - 210}{25}$

$Z = 2.4$

c) If Mary had a score of 1.25, what was Mary’s score?

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