Answer:
b
Step-by-step explanation:
y is x + half of x so 12 + 6 is 18
Answer: 10
25 - 15 = 10
(f^−1)′(6)=1/(f'(f^-1(6)))
(f^−1)′(6)=1/(f'(f^-6)))
I hope this helps.
