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3 years ago

Solver for x- and y- 3x+y=12

1 answer:

4 0

$Salutations!$

First, add -2y to both sides.
$-3x + 2y + -2y = 12 + -2y$
$-3x = -y + 12$

Second, divide by -3 on both sides.

$\frac{-3x}{-3} = \frac{-2y + 12}{-3}$

$x = \frac{2}{3} y - 4$

Hope This Helps!!!

$GlitterWolfy$

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Answer:

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Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

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The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean of 100 and a standard deviation of 15.

This means that $\mu = 100, \sigma = 15$

What IQ score is identified with the upper 2%?

IQ scores of at least the 100 - 2 = 98th percentile, which is X when Z has a p-value of 0.98, so X when Z = 2.054.

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

$2.054 = \frac{X - 100}{15}$

$X - 100 = 15*2.054$

$X = 130.81$

IQ scores of at least 130.81 are identified with the upper 2%.

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