Dariel runs 3 miles in 30 minutes. What is his rate per hour?

6 mph

Step-by-step explanation:

I divided 3 by 30 to find the miles per minute (.1) multiplied it by 60 minutes and got 6.

or you could just double the 3 because Dariel is running 2x as long as the original length and get the same answer

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3