Question

The cost of printing T-shirts is defined by the equation C = 250+5.5n, where C represents the total

cost and I represents the number of T-shirts. If the school paid $965.00, how many T-shirts were
printed?

Answer 1

The school paid for printing 130 T-shirts

Explanation:

Function Models

We are given the cost of printing n T-shirts as the equation:

`C=250+5.5n`

For example, if 10 T-shirts were printed, the school would pay:

`C=250+5.5(10)=250+55=\$305`

We know the school paid $965 and are required to find the number of T-shirts that were printed. If we use the equation with C=965, we can solve it for n:

`965=250+5.5n`

`965-250=5.5n \Rightarrow 5.5n=715`

Solving:

`n=715/5.5=130`

The school paid for printing 130 T-shirts