F(x) = 2x + 1
To find the inverse of a function you just need to switch the x by y or vice-versa:
-> y = 2x + 1
-> x = 2y + 1
After that you isolate the y again:
-> 2y = x - 1
-> y = (x-1)/2
-> f^-1 (x) = (x-1)/2
Answer:
3d+ 3s = $21 because they bought three drinks and three snacks
The roasting time for a 12 pound turkey is 3 hours
-2 you just subtract the 3 by 1
<span />