Final answer:
To find out how much each drink cost, subtract the cost of the movie tickets and the remaining amount from the initial amount of money. Divide the remaining amount by the number of drinks bought to find the cost of each drink.
Step-by-step explanation:
To find out how much each drink cost, we need to subtract the cost of the movie tickets and the remaining amount from the initial amount of money. The initial amount of money they had was $52.00. They spent $34.50 on movie tickets, so they have $52.00 - $34.50 = $17.50 left. From this amount, we subtract the $4.00 remaining, which gives us $17.50 - $4.00 = $13.50. Since they bought 3 drinks, we divide the remaining amount by 3 to find the cost of each drink. So, each drink cost $13.50 ÷ 3 = $4.50.