Brady rose his bike 70 miles in 4 hours. He rode at an average speed of 17 mph for t hours and at an average rate of speed of 22 mph for the rest of the time. How long did Brady ride at the slower speed? Use the variable t to represent the time, in hours, Brady rode at 17 mph.
+36916 Rate * t = Distance
t is the time @ 17 mph
4hrs-t is the time at 22 mph
17*t + 22(4-t) = 70
17t + 88 - 22t = 70
-5t = -18
t = 3.6 hrs @ 17 mph .4 hr @ 22
