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3 years ago

What is -12 = -3y? Can you pls help me

Mathematics

1 answer:

Rashid [163]3 years ago

3 0

Answer:

y = 4

Step-by-step explanation:

-12= -3y

Divide both sides of the equation by

the same term

$\frac{ - 12}{ - 3} = \frac{ - 3y}{ - 3}$

Simplify

Divide the numbers

Cancel terms that are in both the

merator and denominator

Move the variable to the left

y = 4

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If two fair dice are rolled, what is the probability that the total showing is either even or less than nine?

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1/2 and 13/18 respectively

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2 years ago

The weights of college football players are normally distributed with a mean of 200 pounds and a standard deviation of 50 pounds

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Answer:

0.3811 = 38.11% probability that he weighs between 170 and 220 pounds.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

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

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Find the probability that he weighs between 170 and 220 pounds.

This is the pvalue of Z when X = 220 subtracted by the pvalue of Z when X = 170.

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$Z = \frac{170 - 200}{50}$

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