it is most likely a serial number or a card's set number
M+(m+15)=55 or Michael has 20 cards.
You start backwards, you know you have 80 baseball so that makes 40 football. 20 basketball, and 40 hockey.
Either 8 or 15 cards.
20%?
1989 Topps Baseball Talk Complete Set of 164 cards with the Player and original packing has a book value of $250.00 (Beckett 2008 Almanac) I have seen them sell on eBay for as low as $60.$85.The bulk of the value relies on the cards in mint condition. The player in working condition with about 20 -35+ cards, without the box could sell in the $15. -$20 price range.
10 to 15 bucks
The box you have is not a set of cards. It is a box of 36 packs of cards, and if sealed sells for about $10. -$15.
45 cards
$15 to $20
Leaf Limited cards were issued in six-box cases with 20 packs per box and five cards per pack.
A math problem can be written as a story problem. For example: Jay has 15 baseball cards. He gets a packet of 10 new cards for his birthday. How many cards does he have now? 15 cards + 10 cards = 25 cards total *Reading is crucial to determining what operation(s) should be used to solve word problems.
If you mean what cards do baseball card collectors collect,than all kinds of baseball cards. If you mean What is a baseball card collector, than one who collects baseball cards.