Answer:
-13/3
Step-by-step explanation:
Let f(x)=A
x=f'(A)
x=3(A+5)
A=(x-15)/3
f(x)=(x-15)/3
ff(2)=(2-15)/3
=-13/3
no
-7.333
10 is answer choice B
11 is answer choice A
Let
y=2x-10
Switch x and y,
x=2y-10
x+10=2y
(x/2)+5=y
So