Final answer:
To cover the show's expenses, the drama club must sell at least 76 adult tickets after having sold 54 student tickets.
Step-by-step explanation:
The drama club has already made a certain amount from selling 54 student tickets at $6 each, contributing $324 to their goal.
Given that adult tickets sell for $8 each, we can calculate the minimum number of adult tickets that need to be sold to reach at least $930 in total sales to cover the show's expenses.
We subtract the revenue from student tickets ($324) from the total needed ($930), resulting in $606.
Then, we divide $606 by the price of an adult ticket ($8) to find the minimum number of adult tickets required: $606 / $8 = 75.75.
Since you cannot sell a fraction of a ticket, the drama club must sell a minimum of 76 adult tickets.