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2 years ago

Nola’s car gets approximately 42 miles per gallon. She is planning to drive x miles with her friends

Mathematics

2 answers:

Alika [10]2 years ago

8 0

What’s the question?

Oksana_A [137]2 years ago

6 0

If this is the question: what expression represents the number of gallons of gas she should expect to buy?

Then the answer is;

42 miles per gallon

What about x miles?

That gives x times 1 gallon divide by 42 miles

Which equals x/42 gallons.

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Simplify 5a+6a2+7a-4a2-9a

Mice21 [21]

Answer:

2a to the second power + 3a

Step-by-step explanation:

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On the last day of school 217 6th graders wore sneakers to school. If there are 377 students in the 6th grade, what percent wore

fomenos

Answer:

58%

Step-by-step explanation:

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Read 2 more answers

Find the measure of the indicator arc

harina [27]

Answer:

m(WXY) = 224°

Step-by-step explanation:

Measure of inscribed angle = ½ the measure of intercepted arc

Therefore:

m<C = ½*m(WXY)

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2 years ago

A company claims that the mean weight per apple they ship is 120 grams with a standard deviation of 12 grams. Data generated fro

Veronika [31]

Answer:

There is no sufficient evidence to reject the company's claim at the significance level of 0.05

Step-by-step explanation:

Let $\mu$ be the true mean weight per apple the company ship. We want to test the next hypothesis

$H_{0}:\mu=120$ vs $H_{1}:\mu\neq 120$ (two-tailed test).

Because we have a large sample of size n = 49 apples randomly selected from a shipment, the test statistic is given by

$Z=\frac{\bar{X}-120}{\sigma/\sqrt{n}}$ which is normally distributed. The observed value is

$z_{0}=\frac{122.5-120}{12/\sqrt{49}}=1.4583$ . The rejection region for $\alpha = 0.05$ is given by RR = {z| z < -1.96 or z > 1.96} where the area below -1.96 and under the standard normal density is 0.025; and the area above 1.96 and under the standard normal density is 0.025 as well. Because the observed value 1.4583 does not fall inside the rejection region RR, we fail to reject the null hypothesis.

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2 years ago