Answer:
f(4)
Step-by-step explanation:
The answer would be D yeahhhhhh
If you need to simplify the equation it would be:

+2r-2n+7
If not sorry..
Hope This Helps!
Answer:
a = 5 or a = -5
Step-by-step explanation:
If he runs 6 mph for 1.5 hours, he will run a total of 9 miles