A car company charges $35 per day plus 20 cents per mile to rent a car. Write an equation to express the average cost per x mile.

35 + .20x = total charge

35/x + 0.2

To express the average cost per x miles, the equation can be written as:

Average Cost = (Fixed Daily Cost + Variable Cost per Mile * Number of Miles) / Number of Miles

In this case, the fixed daily cost is $35, the variable cost per mile is $0.20, and the number of miles is x.

Therefore, the equation to express the average cost per x mile is:

Average Cost = (35 + 0.20x) / x

To express the average cost per x mile, we need to consider the fixed daily charge of $35 and the additional charge of 20 cents per mile.

Let's break it down step by step:

1. The fixed daily charge is $35, regardless of the number of miles driven.
2. For each additional mile driven, there is an extra charge of 20 cents.

Now, to express the average cost per x mile, we need to consider the total cost incurred for x miles and divide it by x to find the average cost per mile.

The equation would be:

Total cost = Fixed daily charge + Additional charge for x miles
Total cost = $35 + (0.20 * x)

Average cost per mile = Total cost / x
Average cost per mile = ($35 + (0.20 * x)) / x

Therefore, the equation to express the average cost per x mile is:
Average cost per mile = ($35 + (0.20 * x)) / x