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Mathematics 12 Online
OpenStudy (coolio100):

Jack usually mows his lawn in 7 hours. Marilyn can mow the same lawn in 3 hours. How much time would it take for them to mow the lawn together? They could mow the lawn in ___ hours if they worked together.

OpenStudy (coolio100):

Anyone?

OpenStudy (coolio100):

Help pls

OpenStudy (coolio100):

?

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