Question

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.

Answer 1

we have to create and equation to solve this

Answer 2

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

Answer 3

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

Answer 4

I'm not seeing a common denominator there

Answer 5

what do you mean?

Answer 6

of course there is an LCD

Answer 7

maybe 14*22

Answer 8

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

Answer 9

?

Answer 10

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

Answer 11

ok yeah that makes sense, Thanks