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? a. 8 + 35 = 43 and 5 + 35 = 40 and 43 + 40 = 83 balloons b. 5 + 8 = 13 and 13 + 35 = 48 ballons c. 5 x 35 = 175 and 8 x 35 = 280 and 175 + 280 = 455 ballons d. 5 x 8 = 40 and 40 x 35 = 1400 balloons