7. Gavin saved \( \$ 16 \) to buy packs of baseball cards. His father gives him \( \$ 4 \) more. If each pack of cards costs \( \$ 5 \), how many packs can Gavin buy?

Gavin initially saved \( \$ 16 \), and after his father adds \( \$ 4 \), his total money becomes \( \$ 20 \) (because \( 16 + 4 = 20 \)). If each pack of baseball cards costs \( \$ 5 \), we can find out how many packs he can buy by dividing his total money by the cost of each pack: \[ \frac{20}{5} = 4 \] So, Gavin can buy 4 packs of baseball cards! To make this calculation even easier, you can think of it like this: every time he buys a pack, he is spending \( \$ 5 \). With \( \$ 20 \) in hand, he can just keep buying packs and counting how many he gets until his money runs out! It’s a fun little budgeting exercise that helps to know how to prioritize your spending.