Josh rode his bike 17 mi from his home to Columbus, and then traveled 53 mi by car from Columbus to Dayton. Suppose that average rate of car was 43 mph faster than average rate of bike.
A.) State total time needed to complete 70 mi trip (bike and car)as the function of rate of x of bike.
B.) Determine graphically rate of bike if total time of trip was 1 hour and 40 mins confirm algebraically.