What is the inverse of the function " f(x) = 2x+12 / 5

Question

asked Sep 3, 2020 174k views

1 Answer

Damian Moore · Answer 1 · 2020-09-08T09:24:06+0000

Answer:

B. f-1(x) = (5/2) x - 6.

Explanation:

f(x) = (2x + 12) / 5

5 f(x) = 2x + 12

2x = 5 f(x) - 12

x = (5 f(x) - 12) / 2 ow replace the x by f-1(x) and f(x) by x:

f-1(x) = ( 5x - 12)/ 2

f-1(x) = (5/2) x - 6.