Rachel‘s car averages 60 mph.  Robert, who travels by Greyhound bus, will average 50 mph and the train that Barb is riding averages 100 mph.  When should Rachel, Robert, and Barb leave in order to arrive at a city 240 miles at 1:30 p.m.?  Explain your reasoning.

Intermediate Algebra
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ISBN:9780998625720
Author:Lynn Marecek
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Chapter2: Solving Linear Equations
Section2.4: Solve Mixture And Uniform Motion Applications
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Rachel‘s car averages 60 mph.  Robert, who travels by Greyhound bus, will average 50 mph and the train that Barb is riding averages 100 mph.  When should Rachel, Robert, and Barb leave in order to arrive at a city 240 miles at 1:30 p.m.?  Explain your reasoning. 

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