Answer:
($8.75 * a) + ( $6.50 * c) + ( $6.50 * s)
Step-by-step explanation:
The answer is ($8.75 * a) + ( $6.50 * c) + ( $6.50 * s) because it says write an expression for the total cost of the three tickets, while having those variables represent the number of people who purchased those tickets. So
($8.75 * a) + ( $6.50 * c) + ( $6.50 * s)
represent that.