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denis-greek [22]
3 years ago
11

Avery can sweep the deck in 5 minutes and Madeline can do it in 7 minutes. How long will it take them to do it together?​

Mathematics
1 answer:
NISA [10]3 years ago
4 0

Avery in 5 minutes sweeps 1 deck, so in 1 minute she sweeps 1/5 of the deck

Madeline in 7 minutes sweeps 1 deck so in 1 minute she sweeps 1/7 of the deck.

1/5 + 1/7 = 7/35 + 5/35 = 12/35

Together they will sweep 1 deck in x minutes : 1/x

12/35 = 1/x =

X = 35/12 = 2.92 minutes. ( round the answer as needed)

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