Three sevenths of a number is 21 find the number

5x + 2 = 12 solve the following equation. then place the correct number in the box provided.

Which of these tables represents a non-linear function?

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.