What is c3 - 1 when c = 4

Find the difference (8ab+a+2) - (3ab+6)

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

If 3 3/4 lb. of candy costs 20.25 how much would 1lb. of candy cost