Which number sentences show how to solve the problem?


Luis bought 5 bags of red balloons for the party. Ruby bought 8 bags of mixed-color balloons. Each bag contains 35 balloons. How many balloons did Luis and Ruby buy altogether?


Choose all answers that are correct.


A.

5 + 8 = 13 and 13 × 35 = 455


B.

5 × 8 = 40 and 40 + 35 = 75


C.

5 × 35 = 175, 8 × 35 = 280, and 175 + 280 = 455


D.

45 × 15 = 675 and 675 ÷ 9 = 75




im so confused