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OpenStudy (anonymous):
The officejet printer can copy Sue's dissertation in 22 minutes. The laserjet printer can copy the same document in 10 minutes. If the two machines work together how long would they take to copy the dissertation?
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OpenStudy (anonymous):
1/22 +1/10=1
OpenStudy (anonymous):
55/8 minutes working together, roughly 6.875 minutes
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