Question

Determine if the two functions f and g are inverses of each other

Answer 1

Answer:

Yes.

Step-by-step explanation:

$f(g(x))$

$f(\frac{x-12}{9})$  

( I will have to replace all $x$'s in $9x+12$ with $(\frac{x-12}{9}$)

$9(\frac{x-12}{9})+12$

$(x-12)+12$

$x-12+12$

$x+(-12+12)$

$x+0$

$x$

So the answer is yes.