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ivann1987 [24]
2 years ago
12

-10x + 35 + 5x = -5x + 20 PLs fix this error and answer it can you also show me the steps so I understand?

Mathematics
2 answers:
NeX [460]2 years ago
8 0

Answer:

FALSE (no solution)

Step-by-step explanation:

-10x + 35 + 5x = -5x + 20

-10x +5x +x5x = -35 + 20

0 = 15

FALSE

Vedmedyk [2.9K]2 years ago
6 0

Answer:

-10x + 35 + 5x simplifies to -5x + 35.

Step-by-step explanation:

Combine Like Terms:

= −10x + 35 + 5x

= (−10x + 5x) + (35)

= −5x + 35

Hope this helps!

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Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of 4.9 points. Rachel scored 78 p
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Answer:

Keenan's z-score was of 0.61.

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Step-by-step explanation:

Z-score:

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

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

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

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Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of 4.9 points.

This means that X = 80, \mu = 77, \sigma = 4.9

So

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

Z = \frac{80 - 77}{4.9}

Z = 0.61

Keenan's z-score was of 0.61.

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This means that X = 78, \mu = 75, \sigma = 3.7. So

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Z = \frac{75 - 78}{3.7}

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