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3 years ago

simplify, i think the answer is 0 but i am not sure please help me clarify this doubt with explanation

Mathematics

1 answer:

vladimir1956 [14]3 years ago

3 0

Answer:

Step-by-step explanation:

When the same quantities are being divided then the result is 1

2 ÷ 2 = 1

- 3 ÷ - 3 = 1

- $8^{5}$ ÷ - $8^{5}$ = 1

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Sheila purchased ski equipment for $513 using a six-month deferred payment plan. The interest rate after the introductory period

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balance = - $2

There is an excess of 2 dollars at the end.

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3 years ago

What is the area of triangle RFG?

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4 years ago

Identify the range of the following data set. 20, 22, 58, 48, 32, 20, 23

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3 years ago

Read 2 more answers

H(x)=2x: Find (7) please help

erma4kov [3.2K]

Answer:

2(7) = 14

Step-by-step explanation:

When there is a number in the brackets, we want to input that into our function and get the output. In other words, we simply substitute 7 for x

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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)

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3 years ago