Which represents the imverse of the function f(x) = 4x?

For this case we must find the inverse of the following function:

We follow the steps below:

We change f(x) to y:

We exchange the variables:

We solve for and:

We divide between 4 on both sides of the equation:

then y  by

answer: 60

step-by-step explanation:

1/2a + (2/3×30)   = 50

1/2a + 20 = 50

1/2a = 30

a = 60

what i would say the best answer is a. 40.5