Final answer:
To find the amount of change a student would receive when paying with a ten-dollar bill for a $7.50 purchase, subtract the cost of the purchase from the amount paid. In this case, the student would receive $2.50 in change.
Step-by-step explanation:
To find the amount of change a student would receive when paying with a ten-dollar bill for a $7.50 purchase, you need to subtract the cost of the purchase from the amount paid.
10 - 7.50 = 2.50
The student would receive $2.50 in change.