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2 years ago

The sum of two positive numbers is 37, and their difference is 7. If x and y represent the unknown numbers, which two

Mathematics

1 answer:

Effectus [21]2 years ago

7 0

Answer:

x + y = 37

x - y = 7

Step-by-step explanation:

I got it right on the assignment

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A small lawnmower company produced 1,500 lawnmowers in 2008. In an effort to determine how maintenance-free these units were, th

ikadub [295]

Answer:

The 95% confidence interval for the average number of years until the first major repair is (3.1, 3.5).

Step-by-step explanation:

The (1 - α)% confidence interval for the average using the finite correction factor is:

$CI=\bar x\pm z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}\cdot\sqrt{\frac{N-n}{N-1}}$

The information provided is:

$N=1500\\n=183\\\sigma=1.47\\\bar x=3.3$

The critical value of z for 95% confidence level is,

z = 1.96

Compute the 95% confidence interval for the average number of years until the first major repair as follows:

$CI=\bar x\pm z_{\alpha/2}\cdot\frac{\sigma}{\sqrt{n}}\cdot\sqrt{\frac{N-n}{N-1}}$

$=3.3\pm 1.96\times\frac{1.47}{\sqrt{183}}\times\sqrt{\frac{1500-183}{1500-1}}\\\\=3.3\pm 0.19964\\\\=(3.10036, 3.49964)\\\\\approx (3.1, 3.5)$

Thus, the 95% confidence interval for the average number of years until the first major repair is (3.1, 3.5).

7 0

2 years ago

2 25 divided by 11 10 in fraction

koban [17]

Answer:

$\frac{4}{55}$

Step-by-step explanation:

$\frac{2}{25} \div \frac{11}{10}$

$\frac{2}{25} \times \frac{10}{11}$

$\frac{2}{5} \times \frac{2}{11} = \frac{2 \times 2}{5 \times 11}$

$\frac{4}{5 \times 11}$

$= \frac{4}{55}$

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2 years ago

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Simplify this equation, also what is the sign beside 150 and what does it do

Solnce55 [7]

Answer:

<h2>hope it helps you see the attachment for further information ✌✌✌✌✌</h2>

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3 years ago

A football team lost 5 yards on each of 3 plays. Explain how you could use a number line to find the teams change in field posit

patriot [66]

Subtract 5 each play so go backwards from zero and you should finish at -15

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2 years ago

2+2 what's the answer who want to talk

Katarina [22]

Answer:

The answer is 4:

2+2 =4

Step-by-step explanation:

Hi how are you?

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2 years ago

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