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3 years ago

10

I need the expression

2 answers:

V125BC [204]3 years ago

7 0

Answer:

-7( 8n - m )

- 7 × 8n + 7× m

-56n + 7m

Oksi-84 [34.3K]3 years ago

3 0

What you need to do is the distributive property to start with this problem

-7(8n-m)

Multiply -7 inside the parentheses, which it will turn out to be -56n

Then you should put an addition operation on -7 and -m

-56n+7m

You shouldn’t really do anything else to these variables because they are different. So just leave it to that

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Find the mean and standard deviation for the set of data.

dem82 [27]

The mean and standard deviation for the set of data will be 16 and 5.87. Then the correct option is A.

<h3>What is a standard deviation?</h3>

It is the measure of the dispersion of statistical data. Dispersion is the extent to which the value is in a variation.

The set of data is given below.

16, 22, 8, 5, 20, 18, 14, 17, 24

The mean of the data set will be

μ = (16 + 22 + 8 + 5 + 20 + 18 + 14 + 17 + 24) / 9

μ = 144 / 9

μ = 16

Then the standard deviation of the data set will be

$\rm \sigma = \sqrt{\dfrac{\Sigma (x_i - \mu)^2}{n}} \\\sigma = \sqrt{\dfrac{(16 - 16)^2 +(22 - 16)^2 + (8-16)^2 + ......+(24-16)^2 }{9}} \\\sigma = \sqrt{\dfrac{310}{9}}\\$

Simplify the expression further, then we have

σ = √34.44

σ = 5.87

The mean and standard deviation for the set of data will be 16 and 5.87.

Then the correct option is A.

More about the standard deviation link is given below.

brainly.com/question/12402189

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Step-by-step explanation:

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