Christopher buys 200 baseball cards to start a collection. He purchases 50 more baseball cards each week. Write an equation to represent the number of baseball cards (b) in Christopher’s collection after w weeks? How many cards does he have after 5 weeks?


  1. Answer: equation is 200b + (50b · w). He will have 450 cards in 5 weeks.

    Explanation: 50 baseball cards (b) times w then you add the cards he already has, which is 200. To answer question b, w becomes 5, so then it’s 50 baseball cards (b) times 5, which is 250b, then you add 200 (the cards he already has) and the answer is 450. Hope this helped!


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