Question

1.) f(x) = 3x - 7 and g(x) = -2x - 6. Find (f ° g)(4)

2.) What is the inverse of the given relation?
y = 3x + 12

3.) Rewrite ^3 sqrt 27x - 81 - 5 to make it easy to graph using translation. Describe the graph.

I need help with my last 3 questions.

Answer 1

I only need help with #1 I figured out 2 and 3

Answer 2

(fºg)(4) means f[g(4)]

g(4) = -2(4) - 6 = ?

f(?) = 3? - 7

Answer 3

(f°g)(x) = f(g) = 3g-7 = 3(-2x-6)-7 = -6x-25

Now plug in x=4 and compare with the answer you got from Scott