The answer would be H. You can immediately eliminate F and J because they do not include the $10 fee and $39 is the amount charged for one book.
Answer:

Step-by-step explanation:
To find the inverse of this function, you need to replace the location of the x and the y.
You start with
. Now, replace the x and the y, and try to isolate the y.

Hope this helps!
Answer:
16
Step-by-step explanation: