Question

Kira takes classes at both Westside Community College and Pinewood Community College. At Westside, class fees are 98 per credit hour, and at Pinewood, class fees are 115 per credit hour. Kira is taking a combined total of 19 credit hours at the two schools.
Suppose that she is taking w credit hours at Westside. Write an expression for the combined total dollar amount she paid for her class fees.