PLEASE HELP FOR BRAINLIEST! ;)

The answer for 7 is 525

the answer for 8 is a) yes its a random sample and b) the question is not biased because the question is a wide topic with many possible answers.

Step-by-step explanation:

for 7 cross multiply 3000 over x and 200 over 35 and divide the fraction.

for 7, it's a random sample because a) you didn't ask all the boys and b) it's a wide topic with many answers.

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

answer: 4 meters

step-by-step explanation: to you understand 2/3 better you can do 1 divided by 3 = . then multiply that by the 2 which is .66666666666666667 then you would do 6 x .66666666666666667 which is 4.      

hope this .