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Marizza181 [45]

3 years ago

7

Write each decimal as a fraction or mixed number in simplest. -0.15= -7.75= -12.54=

2 answers:

Eva8 [605]3 years ago

6 0

Answer:

= -3/20 = -7 3/4 = -12 27/50

Step-by-step explanation:

For -3/20, we know that .1 is a tenth, so half of that, 0.05, must be a twentieth. -0.15 = -3 x 0.5, so it's -3/20.

For the second problem, we'll set the -7 aside for the mixed number. 0.25 is a quarter, and there's three of them (0.25 x 3 = 0.75), so it's 7 3/4

For the third problem, we again set the -12 aside for the mixed number. 0.54 is 54 one-hundreths, which is 54/100. we can reduce that by dividing both the numerator and denominator of the fraction by 2, and we get 27/50. Because 27 is prime, it cannot be reduced any further, the answer is -12 27/50.

vladimir1956 [14]3 years ago

5 0

-0.15 = -15/100 = -3/20

-7.75 = -7 3/4

-12.54 = -12 54/100 = -12 27/50

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NikAS [45]

Answer:

5 units

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Fynjy0 [20]

Answer:

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Step-by-step explanation:

The z-score measures how many standard deviations a score X is above or below the mean.

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

In which $\mu$ is the mean and $\sigma$ is the standard deviaition.

In all three cases, we have to find X

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$X = 3.0915$

Mean and standard deviation in hours, answer in hours.

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3 years ago