Help!!! Trigonometry

Question

f(x)=1/2x g(x)=x^2 h(x)=x-8 k(x)=√x

Find Each and show your work:

#1 (gk)(4)

#2 (g+k)(5)

#3 (g/k)(9)

#4 f(h(1))

Answer 1

I'll do #1 as an example.

gk(4) = 4²(√4) = 16(2) = 32

I bet you can get the others!