Answer the question and explain the working : ) i’ve got exams coming up and i need to know so much

5/9

There are 81 students total. Two-thirds of this total travel on the bus, so (2/3)*81 = 54 people go on the bus leaving 81 - 54 = 27 that travel in cars. Note how 27 is 1/3 of 81 since (1/3)*81 = 27

There are 3 students in each car, and 27 students in the cars total, so 27/3 = 9 cars are used.

On the way back, each car takes 4 students instead of 3. So the total number of students using cars this time is 9*4 = 36. This leaves 81 - 36 = 45 people taking the bus.

Divide 45 over 81 and reduce as much as possible

45/81 = (5*9)/(9*9) = 5/9

That's how I got the answer 5/9 which means that if there were 9 students total, then 5 take the bus and 4 are in a car.

40 minutes

step-by-step explanation:

add the time and multiply by 2

the answer is 5/14.

hope this .