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OpenStudy (anonymous):
Martha can rake leaves in 7 hrs. Her brother can do the job in 2 hours. How long will it take if they work together?
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OpenStudy (anonymous):
3 1/2 hours
OpenStudy (anonymous):
The choices are a. 1/9 hour b.1 and 5/9 hour c. 2 and 4/5 hour d. 1/14 hr
OpenStudy (anonymous):
i agree with MusicalAnimal 3 1/2 hrs.
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