SOLUTION: The OfficeJet printer can copy Lisa's dissertation in 18 min. The LaserJet printer can copy the same document in 22 min. If the two machines work​ together, how l

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Question 1100643: The OfficeJet printer can copy Lisa's

dissertation in 18

min. The LaserJet printer can copy the same document in 22

min. If the two machines work​ together, how long would they take to copy the​ dissertation?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
1%2F18%2B1%2F22

1%2F%282%2A3%2A3%29%2B1%2F%282%2A11%29

%281%2F%282%2A3%2A3%29%29%2811%2F11%29%2B%281%2F%282%2A11%29%29%289%2F9%29

11%2F198%2B9%2F198

20%2F198

10%2F99

-
time for Lisa's dissertation:
99%2F10
9%269%2F10

9%2654%2F60

9 minutes 54 seconds