Answer:
D. 36.75-3x
Explanation:
You have a total amount of 36.75.
Since you are spending money you need to subtract.
We know that Marshall buys 3 tickets.
We also know that 'x represents the amount of a single ticket.
Remember that they are asking you for an algebraic expression and not an equation.
So you need to take away from your total, 36.75. And since you plan on buying three tickets and aren't given the amount x it leaves you with taking 3x from your total 36.75 or an other words
D. 36.75 - 3x