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Brums [2.3K]
3 years ago
11

What would be the answer to this question? -31=26+a

Mathematics
2 answers:
shtirl [24]3 years ago
5 0

Answer:

a=-57

Step-by-step explanation:

-31=26+a

-26-31=a

a=-57

Sindrei [870]3 years ago
4 0

Answer:

-31=26+a

a= -57

Step-by-step explanation:

a=-26+31 add the numbers together

-a=57 change the signs

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liberstina [14]

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T, F, F, F

Step-by-step explanation:

Sliding the figure to the left 5 times only changes vertex positions, not the shape (making the third false), the sides (making the second and fourth false), or the angle (making the first true)

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Nana76 [90]

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3 years ago
The U.S. Bureau of Labor Statistics reports that of persons who usually work full-time, the average number of hours worked per w
alukav5142 [94]

Answer:

The standard deviation of number of hours worked per week for these workers is 3.91.

Step-by-step explanation:

Problems of normally distributed samples can be 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}

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. Subtracting 1 by the pvalue, we This p-value is the probability that the value of the measure is greater than X.

In this problem we have that:

The average number of hours worked per week is 43.4, so \mu = 43.4.

Suppose 12% of these workers work more than 48 hours. Based on this percentage, what is the standard deviation of number of hours worked per week for these workers.

This means that the Z score of X = 48 has a pvalue of 0.88. This is Z between 1.17 and 1.18. So we use Z = 1.175.

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

1.175 = \frac{48 - 43.4}{\sigma}

1.175\sigma = 4.6

\sigma = \frac{4.6}{1.175}

\sigma = 3.91

The standard deviation of number of hours worked per week for these workers is 3.91.

6 0
3 years ago
It takes Vanessa a half hour to walk to the library. She leaves her house at 5:00. What time does she get to the library?​
serg [7]
She gets to the library at 5:30. Half an hour is equal to 30 minutes, and if she leaves at 5:00, she will be there in thirty minutes.
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2 years ago
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