Iwant to know how to solve 5x-3y==23
7x+3y=-11
with elimination

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

Which recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous year? f(n+1)=f(n)+5

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?