8 There are one hundred forty two students in a high school band These students represent two ninth of the total students in the high school How many students attend the school A 587 B 613 C 639 D 665 820c 380r 4 360 The above equation models the amount of calories in a snack of c cups of cashews and r cups of raisins The amount of calories per cup of cashews is 820 and the amount of calories per cup of raisins is 380 According to the equation how many cups of raisins are used if 3 cups of cashews are used to make the snack A 3 B 4 C 5 D 6