F^-1(x)= (x-4)/-8 because it's just finding the inverse function
Answer:
x=2y/7
Step-by-step explanation:
y=7x^1/2
7/2x=y
7/2x/7/2=y/7/2
For this case we must find the value of "x" of the following expression:

Multiplying by 2 on both sides of the equation:

Subtracting 8x from both sides of the equation:

Adding 16 to both sides:

Dividing between -2 on both sides:

Answer:

To find the rate of commission, divide the amount of commission by his total sales:
2704.94 / 38642.00 = 0.07 = 7%
The answer is D. 7%