mr. Rodriguez, a college instructor, can grade his class papers in 3 hours while it takes his assistant 4 1/2 hours. If Mr. Rodriguez graded the papers for 1 hour and then left the job for his assistant to complete, how long will it take his assistant to finish grading papers?

Answer 1

R did 1/3 of the job

So A has to do 2/3 of the job

(2/3) (4 1/2) = (2/3)(9/2) = 3 hours

Answer 2

1/3+2/9x=1
2/9x=2/3
x=3 hours

Answer 3

What Damon said

Answer 4

R did 1/3 of the job

So A has to do 2/3 of the job

(2/3) (4 1/2) = (2/3)(9/2) = 3 hours

Answer 5

3 and ya i take russian math it sucks

Answer 6

rsm is trash

Answer 7

In that case, that's where you belong, in the trash. Maybe there you can learn some manners, courtesy, and possibly become good at math like me and "hi".