Pls help, and explain. I will give brainliest

Mathematics

1 answer:

-BARSIC- [3]3 years ago

5 0

Answer:

Nicole should take 13 1/8 cups of snack mix.

Step-by-step explanation:

If a serving size is 7/8 and Nicole wants to take 15 serving sizes (15 7/8's), then we must multiply 7/8 by 15:

15 × 7/8

Write 15 over 1 (15 = 15/1) to make the calculations easier:

15/1 × 7/8

Multiply the numerators and denominators separately:

15 × 7 / 1 × 8

105 / 8

Instructions don't say you have to do this but I will convert this improper fraction into a mixed number:

105/8 = 13 1/8

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A researcher wants to test the hypothesis that college students weigh less on average than the average American (160 lbs). The s

Paraphin [41]

Answer: True.

Step-by-step explanation:

Let $\mu$ be the population mean.

Given : Null hypothesis = $H_0:\mu=160$

Alternative hypothesis = $H_1:\mu$

Since , the alternative hypothesis is left-tailed, then the test is a left-tailed test.

The sample mean ( $\overlien{x}$ ) of the 80 students who were weighed was found to be 142 pounds and the p-value was 0.03.

We know that p-value gives that probability that if the null hypothesis is true, than the sample mean ( $\overlien{x}$ ) will be at least as small as the actual mean ( $\mu$ ).

It means that if the mean of all students’ weight is 160 lbs, then there would be only a 3% chance that a randomly selected group of 80 students would have a mean weight of less than 142 lbs.

Hence, the answer is "True".

7 0

4 years ago

Find two numbers x and y with a sum of 200 and a difference of 82

enyata [817]

Answer:

Let x be the bigger number, and y be the smaller number.

$x+y=200$