Aclass of 195 students went on a field trip they took 7 cars and some cars and some buses find of cars and the numbers of busses they took if each other holds 5 students and each bus hold 45 students

Call the buses B and the cars C:

B + C = 7 [7 total vehicles]

45B + 5C = 195 [at 45 per bus and 5 per car, there were 195 students]

Use the first equation to express C in terms of B by subtracting B from both sides:

B + C = 7 becomes C = 7 - B

Substitute 7 - B for C in the second equation:

45B + 5(7 - B) = 195

Multiply out:

45B + 35 - 5B = 195

Simplify and subtract 35 from both sides:

40B = 160

Divide both sides by 40:

B = 4

There were 4 buses and 3 cars used

(w – 2.5)(w + 2.5)

(–4v – 9)(–4v + 9)

step-by-step explanation:

step-by-step explanation:

ok one would be money, and the other would be refreshments or something similar. if each bag of popcorn is 5.00 and each drink is half of that that means drinks are 2.50 the proper way to do that would to look and see how much of each you can buy without exceeding a limit of 30.00