Respuesta :
Add f and g together:
4x + 6 + 9x +9 ( Combine like terms)
13x+15
Now replace x with -6 and solve:
13(-6) +15 = -78 +15 = -63
The answer is -63
4x + 6 + 9x +9 ( Combine like terms)
13x+15
Now replace x with -6 and solve:
13(-6) +15 = -78 +15 = -63
The answer is -63