15 is A, 22+X=8
I don't have time to solve the rest RN but will come back later
Work is provided in the image attached.
The answer to your question is 151.6200 hope I helped
Answer:

Step-by-step explanation:
Suppose h is the inverse of f then
f(x) = y ⇔ h(y) = x
f(x) = y ⇔ 4x = y ⇔ x = y/4
and since x = h(y) then h(y) = y/4
then we can write :

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:)