What is the vaule of x that satisfies the equation -3x-6=30? a. -12 b.-8 c.8 d.12

Mathematics

2 answers:

Jobisdone [24]3 years ago

7 0

A. -12 is the answer

Naddika [18.5K]3 years ago

6 0

I think that the answer is A.

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Three potential employees took an aptitude test. Each person took a different version of the test. The scores are reported below

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Answer:

Due to the higher Z-score, Demetria should be offered the job.

Step-by-step explanation:

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

In this question:

Whichever applicant had grade with the highest z-score should be offered the job.

Demetria got a score of 85.1; this version has a mean of 61.1 and a standard deviation of 12.

For Demetria, we have $X = 85.1, \mu = 61.1, \sigma = 12$ . So