Mathematics, 12.06.2020 00:57 pinkmoonlight

Andrea can clean a house 4 times as fast as Denise. When they work together, Andrea and Denise can clean a large house in 8 hours. How many hours would it take Denise to clean the house by herself? 20 15 10 5

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Andrea can clean a house 4 times as fast as Denise. When they work together, Andrea and Denise can c...

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