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Dirk can clean a playground in 5 hours. Geralyn can clean a playground in only 4 hours. Which of the following can be used to determine the amount of time it would take for Dirk and Geralyn to clean a
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Dirk can clean a playground in 5 hours. Geralyn can clean a playground in only 4 hours. Which of the following can be used to determine the amount of time it would take for Dirk and Geralyn to clean a playground together?

User Marco Staffoli
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The answer is inthe pic
Dirk can clean a playground in 5 hours. Geralyn can clean a playground in only 4 hours-example-1
User Carl Boneri
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