SOLUTION: This is about rational expressions. I would appreciate help. Thanks so much in advance. If Mary can paint one room in 100 minutes, and Jake can paint one room in 150 minutes, ho

Algebra ->  Rational-functions -> SOLUTION: This is about rational expressions. I would appreciate help. Thanks so much in advance. If Mary can paint one room in 100 minutes, and Jake can paint one room in 150 minutes, ho      Log On


   

Question 635483: This is about rational expressions. I would appreciate help. Thanks so much in advance.
If Mary can paint one room in 100 minutes, and Jake can paint one room in 150 minutes, how long will it take if they work together?
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


If A can do a job in x time periods, then A can do of the job in 1 time period. Likewise, if B can do the same job in y time periods, then B can do of the job in 1 time period.

So, working together, they can do



of the job in 1 time period.

Therefore, they can do the whole job in:



time periods.


John

My calculator said it, I believe it, that settles it
The Out Campaign: Scarlet Letter of Atheism