3 years ago

Solve for a. 7a + 18 = 102 a =

Mathematics

2 answers:

Virty [35]3 years ago

6 0

Answer:

Step-by-step explanation:

Inessa [10]3 years ago

3 0

7a+18=102
7a= 102-18
7a= 84
a = 84/7= 12

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Step-by-step explanation:

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2 years ago

Find the inverse of y=ln2x

never [62]

Answer:

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Step-by-step explanation:The exponential function, exp : R → (0,∞), is the inverse of the natural logarithm, that is, exp(x) = y ⇔ x = ln(y). Remark: Since ln(1) = 0, then exp(0) = 1. Since ln(e) = 1, then exp(1) = e.

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The annual salaries of all employees at a financial company are normally distributed with a mean of $34,000 and a standard devia

lora16 [44]

z-score of a company is 5.

What is z- test?

A z-test is a statistical test used to determine whether two population means are different when the variances are known and the sample size is large.

The annual salaries of all employees at a financial company are normally distributed with a mean of $34,000 and a standard deviation of $4,000.

Now, using z- score

z= (x- $\mu$ )/ $\sigma$