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3 years ago

Two shirts and one tie costs $42, but one shirt and two ties cost $39. What does one shirt cost?

Mathematics

1 answer:

amid [387]3 years ago

3 0

Let s = shirts
let t = ties
2s + t = 42
s + 2t = 39
s = 15
t = 12
one shirt equals $15

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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:

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

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Given that:

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for x = 62:

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for x = 47:

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for x = 56:

$z=\frac{56-56}{4 } =0$

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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2 years ago

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Because any number that you put in for x won't make the range less than 2. If you put in zero for x, the range is 2.

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3 years ago

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