To create an equation that models the situation, we can define the variables as follows:
- Let \( C \) be the total cost.
- Let \( t \) be the number of tickets (which represents the number of students and teachers attending).
The total cost \( C \) can be expressed as:
\[ C = 500 + 20t \]
where $500 is the fixed cost of the bus rental, and $20t is the variable cost of the tickets for the attendees.
Now, if 60 students and teachers plan to attend (thus, \( t = 60 \)), we can substitute this value into the equation:
\[ C = 500 + 20(60) \] \[ C = 500 + 1200 \] \[ C = 1700 \]
So the total cost for the event will be $1,700.
The correct answer from the choices given is:
- C = 500 + 20t; $1,700