Answer: the total amount that Luis spent for the concert ticket, hotel, and dinner is $106.75
Explanation:
Luis purchased a concert ticket for $17.50. The cost of his hotel was
4 1/2 times as much as his ticket. It means that the cost of his ticket was
4.5 × 17.5 = $78.75
His dinner was 3/5 the cost of his ticket. It means that the cost of his dinner was
3/5 × 17.5 = $10.5
Therefore, the total amount that Luis spent for the concert ticket, hotel, and dinner is
17.5 + 78.75 + 10.5 = $106.75