2. discuss how you might select a random sample to estimate the population mean rating of all 100 computer games.

Step-by-step explanation:

For calculating how large is a sample size that is large enough for estimating the population mean, we should consider the error that we are ready to agree, because the sample size depends on this error.

If your error is α, the sample size would be:

Where N: the population size, in your case N = 100

            δ: the standar deviation

            Z:  the value associated to the error in the standard normal table

            E: error

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40

1. x> -5

2. x< 8

step-by-step explanation:

1. 2x> -10

divide by 2 from both sides of equation.

2x/2> -10/2

simplify, to find the answer.

-10/2=-5

x> -5 is the correct answer.

2. 3x< 24

divide by 3 from both sides of equation.

3x/3< 24/3

simplify, to find the answer.

24/3=8

x< 8 is the correct answer.

i hope this you, and have a wonderful day!