OfficeJet printer can copy Maria's dissertation in 14 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.

Question

anonymous · Answer

we have to create and equation to solve this

anonymous · Answer

lets say: (1/14)+(1/22)=(1/x)

anonymous · Answer

if you can solve, this you will have the answer to your question :)

anonymous · Answer

I'm not seeing a common denominator there

anonymous · Answer

what do you mean?

anonymous · Answer

of course there is an LCD

anonymous · Answer

maybe 14*22

anonymous · Answer

Ok yeah 308 so 22/308 + 14/308 = 36/308 = 18/154 = 9/77?

anonymous · Answer

?

anonymous · Answer

hmm, check using product/sum: (14*22)/(14+22)=308/36=8.5555or8.6 hours

anonymous · Answer

ok yeah that makes sense, Thanks