Answer
34 tickets
Work Step by Step
Let x = the ticket price
The members of the club sold 50 tickets at a special $\$5$ rate: $50(5)+7.5x$
The total amount needs to be $\$500$ so:
$50(5)+7.5x=500$
$7.5x=250$
$x\approx33.33$
To raise at least $\$500$ in ticket sales for the annual show we need to round up the solution to $34$.