Question

Please help ! Algebra

Answer 1

f^-1(3) =7

Explanation:

no calculate f^-1 :

let : f^-1(3) =a so : f(a) = 3

(2a-2)/4 = 3

2a-2 = 12

2a=14

a = 7

f^-1(3) =7

Answer 2

C

Explanation:

y = (2x - 2) / 4 Interchange x and y

x = (2y - 2) / 4 Multiply both sides by 4

4x = 2y - 2 Add 2 to both sides.

4x + 2 = 2y Divide both sides by 2

4x/2 + 2/2 = 2y / 2

2x + 1 = y

Now put 3 in wherever you see an x

2*3 + 1 = y

6 + 1 = y

7 = y