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Mathematics 7 Online
OpenStudy (anonymous):

A boat makes a 120-mile trip downstream in 3 hours but makes the return trip in 4 hours. If b = the rate of the boat in still water and c = the rate of the current, which of the following equations represents the trip upstream? 3(b - c) = 120 4(b - c) = 120 4(b + c) = 120

OpenStudy (anonymous):

in upstream you are going against the current.so speed becomes b-c..i guess you can solve it now

OpenStudy (anonymous):

the second one

OpenStudy (anonymous):

?

OpenStudy (anonymous):

yes.. you are right

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