Question

which problem could be solved with the expression (6 + 4) × 3? choose 1 answer: a barry ate 3 cookies on monday. he then ate 6 cookies on tuesday. on friday he ate 4 cookies. he follows this pattern for 4 weeks. how many cookies did he eat? b edward mowed 3 lawns in the morning and 6 lawns in the afternoon. he did this for 4 days. how many lawns did he mow? c danielle had 6 dolls. she bought 4 additional dolls. she then went to the thrift store and tripled her collection. how many dolls does she have now?

Explanation:

Step1: Analyze Option A

Barry's cookie - eating pattern: Monday (3), Tuesday (6), Friday (4). For 4 weeks, the total cookies would be calculated as \(4\times(3 + 6+4)\), not \((6 + 4)\times3\). So Option A is incorrect.

Step2: Analyze Option B

Edward mowed 3 lawns in the morning and 6 lawns in the afternoon. The number of lawns per day is \(3 + 6\), and for 4 days, the total is \((3 + 6)\times4\), not \((6 + 4)\times3\). So Option B is incorrect.

Step3: Analyze Option C

Danielle had 6 dolls, bought 4 more. So the number of dolls before tripling is \(6+4\). Then she tripled her collection, so the total number of dolls is \((6 + 4)\times3\). This matches the given expression.

Answer:

C. Danielle had 6 dolls. She bought 4 additional dolls. She then went to the thrift store and tripled her collection. How many dolls does she have now?