Final answer:
Dave has $17 and needs to buy an $8 book and two identical birthday cards. After purchasing the book, he has $9 left, which means he can spend $4.50 on each card.
Step-by-step explanation:
The question pertains to a budgeting problem where Dave has a certain amount of money and needs to allocate it to different purchases. Here is the step-by-step solution to the problem:
- Firstly, subtract the cost of the book from Dave's total amount of money: $17 - $8 for the book = $9 remaining.
- Since Dave needs to buy two identical birthday cards with the remaining money, divide the remaining amount by two to find the cost he can spend on each card: $9 ÷ 2 = $4.50 per card.
Therefore, Dave can spend $4.50 on each birthday card.