Answer:
The greatest common factor is 4 :)
In other words, find the inverse of the given function f(x).
1. Replace f(x) with "y." y = 8(x+10)
2. Interchange x and y: x = 8(y+10)
3. Solve this for y: y+10 = x/8, or y = x/8 - 10
-1
4. Replace "y" with "f (x) "
-1 x-80
f (x) = ---------- (Answer)
8
2: 17.5 years. Work; 12 months in one year, 210 months divided by 12 months= 17.5 years.
