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3 years ago

PLEASE HELP ASAP 35 PTS

Mathematics

1 answer:

salantis [7]3 years ago

4 0

Answer:

Step-by-step explanation:

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Factor the following polynomials by grouping:<br> ax+ay+bx + by −cx−cy

Eddi Din [679]

Answer:

(a + b -c) x (x +y )

Step-by-step explanation:

Firstly, factor out x from the expression

Then, factor out the y from the expression

8 0

3 years ago

How does the speed of one car relative to the other compare with speed of the car relative to the ground?

yulyashka [42]

(n-1)-3 = (3n)/2 This is the equation used to represent the information given

8 0

3 years ago

If the weight of a package is multiplied by 516 the result is 10 lbs. Find the

zysi [14]

Answer:

0.1937984496 lbs

Step-by-step explanation:

10 ÷ 516

7 0

3 years ago

The standard deviation of a sample taken from population A is 17.6 for a sample of 25.

lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation $\sigma_A$ is

$\sigma_A = 17.6$

The sample size $n_A$ is:

$n_A = 25$ .

For the sample of population B, the standard deviation $\sigma_B$ is

$\sigma_B = 21.2$

The sample size $n_B$ is:

$n_B = 30$ .

Then the standard deviation for the difference of means has the following form:

$\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}$

Finally

$\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23$

7 0

3 years ago

Eli lives 3 3/4 miles from the library. He decided to bike from his home to the library to return some books. Eli biked 1 1/10 m

KIM [24]

Eli traveled a total of 8.6 miles. He went to the library and back. 3.75 + 3.75. and he also added and extra 1 1/10 mile. so, 3.75 x 2 = 7.5, 7.5 + 1 1/10 = 8.6. Hope that helped!

7 0

3 years ago

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