How large a sample size would be needed to estimate the percentage of wireless routers in San Francisco that use data encryption, with an error of ± 2 percent and 95 percent confidence?

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation:

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation: