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3 years ago

GIVING BRAINLIEST!!

Mathematics

1 answer:

FinnZ [79.3K]3 years ago

8 0

Answer:

From home it looks like it took her 2 hours and 30 minutes

Step-by-step explanation:

If you look when she started, 10 A.M, and look when she first arrived at the campground, 12:30 P.M, you can see it took her 2 and a half hours.

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Please answer this math question !! Multiple choice !! Thank u and I will give brianliest !!

never [62]

Answer:

Step-by-step explanation:

Perpendicular lines have opposite-reciprocal slopes

So if I had a slope of 2, the perpendicular slope would be -1/2.

Or if I had a slope of -7, the reciprocal is -1/7 and the opposite would be 1/7.

Hope this helps!

6 0

3 years ago

Read 2 more answers

What is the price of a $500 tv after a 20% discount?

Hunter-Best [27]

It’s going to be 400 dollars, 20percent is 100 dollars

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3 years ago

A consumer group selected 100 different airplanes at random from each of two large airlines. The mean seat width for the 100 air

Novay_Z [31]

Answer:

Decreasing the sample size decreases the width of the confidence interval.

Step-by-step explanation:

-Let s be the sample standard deviation and $\bar X$ be the sample mean.

#We calculate the 95% confidence interval for the sample size 100 as below:

$\bar X\pm z_{0.05/2}\frac{s}{\sqrt{n}}\\\\\\=\bar X\pm 1.960\times\frac{s}{\sqrt{50}}\\\\\\=\bar X\pm 0.1960s$

#we then calculate the confidence interval of sample size =50 and of similar mean and standard deviation:

$\bar X\pm z\frac{s}{\sqrt{n}}\\\\\\=\bar X\pm z_{0.05/2}\times\frac{s}{\sqrt{n}}\\\\\\=\bar X\pm1.960\times \frac{s}{\sqrt{50}}\\\\\\\\=\bar X\pm0.2772s$

#Notice that the smaller sample(n=50) has a narrower confidence interval.

Hence, decreasing the sample size decreases the width of the confidence interval.

6 0

3 years ago

Read 2 more answers

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erma4kov [3.2K]

Answer: C

Step-by-step explanation:

5 0

3 years ago

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Which fraction is greater 36/126 or 42/126?

trapecia [35]

Since both fractions have the same denominator, to find the greater one all you have to do is see which one has a bigger numerator
42>36
the answer is 42/126 is greater

6 0

4 years ago