Mathematics, 04.03.2021 01:00 25cotahai
Elena has a boat that would go 9 miles per hour in still water. She travels downstream for a certain distance and then back upstream to where she started. Elena notices that it takes her 4 hours to travel upstream and 2 hours to travel downstream. The river’s speed is r miles per hour.
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Elena has a boat that would go 9 miles per hour in still water. She travels downstream for a certain...
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