A shirt costs 15 dollars. You buy 's' shirts and pay with a 50 dollar bill. Which expression represents the change you receive?
Correct: B
First, find the total cost of 's' shirts. If one shirt costs 15 dollars, 's' shirts will cost 15 * s, or 15s dollars.
To find the change received, you subtract the total cost of the shirts from the amount you paid.
Amount paid: 50 dollars
Total cost of shirts: 15s dollars
Change = Amount paid - Total cost = 50 - 15s
So, the expression for the change you receive is 50 - 15s.