In a sphere, if the radius is tripled, how much more volume do you have?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Percy rides his bike 11.2 miles in 1.4 hours at a constant rate. write an equation to represent the proportional relationship between the number of hours percy rides, x,and the distance in miles, y, that he travels.

Solve for the equation. 4x - 13 = 2x + 9