Solve the system of equation by substitution
y=-2x+9
-8y=16x-72

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

Consider the function f(x)=-5x+3 what is f(-2)