Mando collects baseball cards he currently has 24 cards and buys 5 new cards a week how many cards will ma do have in 20 weeks

So Mando currently has 24 cards so let's leave that aside

5 new cards per week

5*20 = 100

so he will have 100 new cards after 20 weeks

so add the cards he currently have with the new cards so

100+24 = 124

Mando will have 124 after 20 weeks

124 cards. You multiple 5x20 for how many weeks and then add the 24 back on.