Respuesta :
6th grade wash 16 cars
7th grade was 75% as many as 6th grade....0.75(16) = 12 cars washed
8th grade wash half as many as 6th and 7th combined...(12 + 16) / 2 =
28/2 = 14 cars washed
total cars washed : (16 + 12 + 14) = 42 cars
at $ 5 per car.....42 * 5 = $ 210 <===
7th grade was 75% as many as 6th grade....0.75(16) = 12 cars washed
8th grade wash half as many as 6th and 7th combined...(12 + 16) / 2 =
28/2 = 14 cars washed
total cars washed : (16 + 12 + 14) = 42 cars
at $ 5 per car.....42 * 5 = $ 210 <===