Question

yesterday, bill had k baseball cards. today, he gave 9 away. using k, write an expression for the number of cards bill has left.

Explanation:

Step1: Identify the initial number of cards

Bill had \( k \) baseball cards initially.

Step2: Subtract the number of cards given away

Today, he gave away 9 cards. To find the number of cards left, we subtract the number of cards given away from the initial number of cards. So the expression is \( k - 9 \).

Answer:

\( k - 9 \)