Simplify the expression. 7m^2+6.5n-4n+2.5m^2-n
a.) 1.5m^2+4.2n
b.)4.2m^2+1.5n
c.)1.5m^2-4.2n
d.)4.2m^2-1.5n

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter? a. 3x^2 + 38x + 55 b. 4x + 16 c. 5x + 16 d. 3x^3 + 38x^2 + 55x