Answer:
Yes, I like the movie and the musical.
Step-by-step explanation:
I'll be your friend.
Answer:
Square.
Step-by-step explanation:
A square is a rectangle, but a rectangle is not a square.
Going out on a limb here and guessing that the function is

Please correct me if this isn't the case.
Recall that

which converges for

.
It follows that

(f-g)(x) = x²+6x - (7-x)
(f-g)(x) = x² + 6x - 7 + x
(f-g)(x) = x² + 7x - 7
(f-g)(9) = 9² + 7*9 - 7
(f-g)(9) = 81 + 63 - 7
(f-g)(9) = 137