Algebra 2 solving functions

Question

Supposed at the following functions U and W are defined as follows

u(x) =5x+4

w(x)=-3x

(u•w)(-4)

(w•u)(-4)

Answer 1

I think the problem is asking for the result of composite functions at x = -4.

(u o w)(x) = 5(-3x)+4 = -15x+4

(u o w)(-4) = -15(-4)) +4 = 60+4 = 64

(w o u)(x) = -3(5x+4)=-15x-12

(w o u)(-4) = -15(-4)-12 = 60-12 = 48