Use f(x) = 2x + 5

Find f^-1 (11)

If you're looking for the inverse, the answer is:

b, i believe, but not sure.

answer:  

step-by-step explanation:

odd numbers are only divisible by 1 and itself.

even numbers are divisible by more than 1 and itself.

for example 6 is even because it is divisible by more than 1 and its self. 1 x 6= 6 ; 2 x 3= 6

and 7 is odd because only 7 x 1 equals seveb