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3 years ago

Solve: |v + 8| − 5 = 2

Mathematics

2 answers:

marissa [1.9K]3 years ago

4 0

The answer would be v = -1 ,-15

AveGali [126]3 years ago

3 0

Answer:

v¹= -15, v²= -1

Step-by-step explanation:

there's 2 solutions to this

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Evaluate the expression 2b ^3+5 when b=3

pochemuha

Answer:

Step-by-step explanation:

b^3 is 27

2(27) is 54

54+5 is 59

if u mean (2b)^3 then 2b is 6

6^3 is 216

plus 5 is 221

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2 years ago

Make r the subject of the formula in 1 - E Rr

Artemon [7]

Answer:

r= 1r- eR = r

Step-by-step explanation:

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2 years ago

What is the volume of this figure?

Sav [38]

Answer:

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Step-by-step explanation:

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3 years ago

What is the mixed decimal 17.45 as a mixed number and reduce to lowest terms

Hunter-Best [27]

17.45 = 17 45
100 and you can divide the numerator and denominator by 5

so the final answer is 17 9
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3 years ago

In a recent study of 42 eighth graders, the mean number of hours per week that they watched television was 19.6. Assume the popu

olya-2409 [2.1K]

Answer:

$19.6-2.42\frac{5.8}{\sqrt{42}}=17.43$

$19.6+2.42\frac{5.8}{\sqrt{42}}=21.77$

And the best option for this case would be:

a. (17.5, 21.7)

Step-by-step explanation:

Information given

$\bar X= 19.6$ represent the sample mean

$\mu$ population mean

$\sigma= 5.8$ represent the population deviation

n=42 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom, given by:

$df=n-1=42-1=41$

Since the Confidence is 0.98 or 98%, the significance would be $\alpha=0.02$ and $\alpha/2 =0.1$ , and the critical value would be $t_{\alpha/2}=2.42$

Replacing we got:

$19.6-2.42\frac{5.8}{\sqrt{42}}=17.43$

$19.6+2.42\frac{5.8}{\sqrt{42}}=21.77$

And the best option for this case would be:

a. (17.5, 21.7)

8 0

3 years ago