Answer:

Step-by-step explanation:
We have been given that the average cost c (in dollars) to manufacture x T-shirts is given by the function
. We are asked to express Express the number of T-shirts in terms of the average cost.
We need to solve for x is terms of C.
First of all, we will combine like terms as shown below:

Now, to solve for x, w will divide both sides by 415 as:



Therefore, the equation
represents the number of T-shirts in terms of the average cost.