Final answer:
After dividing the total money ($40) by the number of boys (4), each boy had $10. Subtracting the movie ticket price of $7.50 from this amount, each boy had $2.50 left.
Step-by-step explanation:
The question requires using basic arithmetic to determine how much money each boy had after purchasing a movie ticket. Since Miguel and his three friends had a total of $40 and all spent $7.50 each on tickets, the calculation is as follows:
- First, divide the total amount of money ($40) by the number of boys (4) to find out how much each boy had originally. $40 ÷ 4 = $10 per boy.
- Next, subtract the cost of the movie ticket ($7.50) from the amount each boy had ($10) to determine how much money each boy had left. $10 - $7.50 = $2.50.
Therefore, each boy had $2.50 left after buying a movie ticket.