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3 years ago

X + 7 < 15 I need to know what this answer is and quick

Mathematics

1 answer:

sergij07 [2.7K]3 years ago

4 0

Answer:

x<8

Step-by-step explanation:

x+7<15

x<15-7

x<8

$hope \: it \: helps$

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The mean speed of vehicles along a stretch of highway is 56 mph with a standard deviation of 4 mph. You

Elenna [48]

The corresponding z score for speed of 62 mph, 47 mph, and 56 mph is 1.5, -2.25 and 0 respectively.

<h3>Z score</h3>

Z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by:

$z=\frac{x-\mu}{\sigma }$

Where x is raw score, μ is mean, σ is standard deviation

Given that:

σ = 4, μ = 56, hence

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for x = 47:

$z=\frac{47-56}{4 } =-2.25$

for x = 56:

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The corresponding z score for speed of 62 mph, 47 mph, and 56 mph is 1.5, -2.25 and 0 respectively.

Find out more on Z score at: brainly.com/question/25638875

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