2 years is the same as 24 months, so the equation would be:
685 = 24x + 85, where x is the monthly fee.
600 = 24x
600/24 = x
x = 25
The monthly fee is $25.
Answer:
18
Step-by-step explanation:

Kira completed 22 Laps, and Ahmad completed 24 laps.
If it is exactly 90 degrees you are looking for, your answer would be, 3:0:0. Which is 3:00.
F(x)=2x
G(x)=x+5
Now
F(g(x))=2(x+5)
=2x+10
G(f(x))=2x+5