Question

If f(x)=-8-5x, what is f(-4) (If possible, explain your answer)

Answer 1

 f(-4) all you need to do is plug in x = -4 into equation 
so If f(x)=-8-5x then
f(-4) = -8 - 5(-4)
f(-4) = -8 + 20
f(-4) = 12

answer
f(-4) = 12