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Sedaia [141]
1 year ago
11

You owe your friend $35 and then you borrow an additional $60. How much in total do you owe your friend? What number would this

be on a number line?
OYou owe $95; -95 on the number line
O You owe $25; -25 on the number line
O You owe $5; 25 on the number line
O You owe $95; 95 on the number line​
Mathematics
1 answer:
crimeas [40]1 year ago
8 0

Answer:

A. You owe 95; -95 on the number line

Step-by-step explanation:

You want to add up these two numbers so you get:

35+60 = 95

Since you owe them it is negative on the number line; that is -95

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2 years ago
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48. Reading Rates The reading speed of sixth-grade students is approximately normal, with a mean speed of 125 words per minute a
son4ous [18]

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}

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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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Answer:

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Step-by-step explanation:

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To find the mean add up all the numbers and divide. The mean absolute deviation is the difference.
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