Respuesta :

daquonallen4l
About 2 hours I believe
DGBxBigxBrain

Answer:

2.92 or 35/12

Step-by-step explanation:

Each hour sally does 1/5 and Steve does 1/7 1/5+1/7=12/35

each hour they do 12/35

So divide 1 by 12/35 to find how long it takes and you get

35/12 or ≈2.92

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