Question

If f (x) = -3x-5 and g(x) =4x-2 find (f+g)(x)

Answer 1

C. (f + g)(x) = x - 7

Explanation:

`(f+g)(x)=f(x)+g(x)\\\\\text{Substitute}\ f(x)=-3x-5\ \text{and}\ g(x)=4x-2:\\\\(f+g)(x)=(-3x-5)+(4x-2)\qquad\text{combine like terms}\\\\(f+g)(x)=(-3x+4x)+(-5-2)\\\\(f+g)(x)=x-7`