Question

Michael has 72 sports cards. The ratio of baseball cards to football cards is 1:7. How many baseball cards does he have?

Answer 1

9 baseball cards

Explanation:

Let x be the amount of baseball cards Michael has. He would then have 7x football cards because of the 1:7 ratio.

We can use this information to set up an equation:

x+7x=72

8x=72

Divide both sides by 8

x=9

We can check our answer:

9+9(7)=9+63=72 (correct!)

He has 9 baseball cards