posted by Kevin .
Jamie ran two laps around a track in 99 s. How long did it take him to run each lap if he ran the first lap at 8.5 m/s and the second at 8.0 m/s?
if the times are x and 99-x, then since the distances are equal, then
8.5x = 8.0(99-x)
x = 48
the laps took 48 and 51 seconds