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OpenStudy (anonymous):
James drives 5 miles per hour slower than Ken. If James travels 100 miles in the same time that Ken travels 110miles, find each rate. (need an equation to solve it..any help?)
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OpenStudy (saifoo.khan):
D=RT 100=(R-5)T OR T=100/(R-5) FOR JAMES 110=RT OR T=110/R FOR KEN SET THESE 2 EQUATIONS EQUAL & SOLVE FOR R. 100/(R-5)=110/R CROSS MULTIPLY, 110(R-5)=100R 110R-550=100R 100R-100R=550 10R=550 R=550/10 R=55 MPH FOR KEN. 55-5=50 MPH IS THE RATE FOR JAMES. 110=55*T T=110/55 T=2 HOURS.
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