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Mila [183]
3 years ago
7

What do you do when the x is a negative but the answer for x is a positive?

Mathematics
1 answer:
Alecsey [184]3 years ago
4 0
Just switch the negative sign over to the answer. so if you had -x = 6, then just switch the sign over to the 6. You would have the answer of x=-6, which is the same thing as -x=6
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3 years ago
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Alik [6]

Answer:

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Step-by-step explanation:

Normal Probability Distribution

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In this question:

Mean \mu, standard deviation \sigma

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The probability of a pregnancy lasting X days or longer is given by 1 subtracted by the p-value of Z = \frac{X - \mu}{\sigma}, in which \mu is the mean and \sigma is the standard deviation.

b. If the length of pregnancy is in the lowest a​%, then the baby is premature. Find the length that separates premature babies from those who are not premature.

We have to find X when Z has a p-value of \frac{a}{100}, and X is given by: X = \mu - Z\sigma, in which \mu is the mean and \sigma is the standard deviation.

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