Evaluate 15÷3·(-2) + |-10|

Mathematics

2 answers:

vovikov84 [41]3 years ago

6 0

The answer is 0. If you plug it into a calculator it takes only 5 seconds.

Scilla [17]3 years ago

6 0

I am horrible at math but i think this may be zero because the -10 would become positive?? sorry if this isn't much help ): good luck!

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Suppose x is a normally distributed random variable with a mean of 22 and a standard deviation of 5. The probability that x is l

MaRussiya [10]

Answer:

The probability that x is less than 9.7 is 0.0069 = 0.69%

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:

$\mu = 22, \sigma = 5$