At Westside, class fees are $98 per credit hour, and at Pinewood, class fees are $115 per credit hour. Ann is taking a combined total of 20 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.

y = 98(w) + 115(20 - w).

Step-by-step explanation:

Ann takes a combine 20 credit hours, and she is taking w credits at Westside, this means that she has to take the rest at Pinewood.

(total credits at Westside)($98) + (total credits at pinewood)($115).

Assuming that she takes all credits at Westside then we say

20(98) + 0, and this is the lowest cost it will be

Assuming she takes all credits at Pinewood, then we say

0 + (20)(115) and this will be the maximum she would pay for 20 credits.

Let y be the total cost of her courses, then we say

y = 98(w) + 115(20 - w).

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