Aclass of 195 students went on a field trip. they took 7 vehicles, some cars and some buses. find the number of cars and buses taken if each car holds 5 students and each bus holds 45 students.

solve and show equations along with work, giving 95 points to the correct answer.

The number of cars taken: 3

The number of buses taken: 4

Step-by-step explanation:

Lets b = # of buses and c = # of cars

b + c = 7  > b = 7 - c

45b + 5c = 195

Substitute b = 7 - c into 45b + 5c = 195

45(7 - c)+ 5c = 195

315 - 45c +  5c = 195

315 - 40c = 195

-40c = -120

    c = 3

    b = 7 - 3

    b = 4

The number of cars taken: 3

The number of buses taken: 4

42

step-by-step explanation:

256/6=42

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: