Question

Frank had 4b baseball cards, and his brother had b baseball cards. They combined their cards, and then gave away 2b cards. The expression below shows how many they had left.

4b+b-2b



Which of the following is another expression that could be used to get the same result, and what does it represent?
A.
5b - 2. This represents that Frank and his brother had 5b - 2 cards left.
B.
3 - b. This represents that Frank and his brother had 3 - b cards left.
C.
3b. This represents that Frank and his brother had 3b cards left.
D.
5b - 3b. This represents that Frank and his brother had 5b - 3b cards left.

Answer 1

Answer: C. 3b.

Reason: 4b + b - 2b = (4 + 1 - 2)b = 3b. That represents the number of cards they had left (three times b).