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Jobisdone [24]
3 years ago
7

Find the value of 3 + [(-6 + 2) - 32].

Mathematics
2 answers:
goldenfox [79]3 years ago
7 0

Answer:

The correct answer is -10

Step-by-step explanation:

WINSTONCH [101]3 years ago
3 0
Hello!

First do what is in parenthesis first

3 + [ -4 - 32]

Parenthesis again

3 + -36

Add

-33

The answer is -33

Hope this helps!
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Answer:

The reading speed of a sixth-grader whose reading speed is at the 90th percentile is 155.72 words per minute.

Step-by-step explanation:

Problems of normally distributed samples are solved using 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}

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 pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 125, \sigma = 24

What is the reading speed of a sixth-grader whose reading speed is at the 90th percentile

This is the value of X when Z has a pvalue of 0.9. So it is X when Z = 1.28.

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

1.28 = \frac{X - 125}{24}

X - 125 = 1.28*24

X = 155.72

The reading speed of a sixth-grader whose reading speed is at the 90th percentile is 155.72 words per minute.

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3 years ago
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Answer:

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Step-by-step explanation:

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x/4 = 13/4

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