53 + 88 = , adjust the sum or difference

Acompany wants to reduce the dimensions of its logo by one fourth to use on business cards. if the area of the original logo is 4 square inches, what is the area of the logo that will be used on the business cards?

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2