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Gilda drove 650miles at an average speed of 50 miles per hour.how many miles per hour faster would she have had to drive in order for the trip to have 1 hour less?

Respuesta :

irspow
t=650mi(hr/50mi)=13 hr

t-1=12 hr

12=650/(50+v)  multiply both sides by 50+v

600+12v=650  subtract 600 from both sides

12v=50  divide both sides by 12

v=25/6 mph

v≈4.17mph


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