SOLUTION: The new laser printer can print a 100 page report in 3 minutes. The old dot matrix printer can print 100 pages in 9 minutes. If the two printers worked together, how long would

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: The new laser printer can print a 100 page report in 3 minutes. The old dot matrix printer can print 100 pages in 9 minutes. If the two printers worked together, how long would      Log On


   

Question 313167: The new laser printer can print a 100 page report in 3 minutes.
The old dot matrix printer can print 100 pages in 9 minutes.
If the two printers worked together, how long would it take to print the 100 page report?
Rate of laser: 1/3 Rate of dot matrix: 1/9 The equation is: x/3+x/9=1

and three other ways to solve this problem what are the steps?
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