Which two expressions are equivalent for any value of r?* a. 3(3r + 3) and 6r +6
b. 3(3r + 3) and 9r + 6
c. 9(r + 3) and 12 + 91
d. 9(r + 3) and 27 +91
Pick one of the remaining choices and explain on the lines below, why that
choice contains two expressions that are not equivalent for any value of r. help pls I'm just picking random stuff at this point​

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

Dropping less than two inches per mile after emerging from the mountains, a river drains into the ocean. one day's discharge at its mouth, 5.6 trillion gallons, could supply all of country a's households for seven months. based on this statement, determine how much water an average household uses each month. assume that there are 100 million households in country a. country a uses approximately nothing gallons per household per month.

When the ball has traveled a distance of