Problem solved; thanks Thaakisfox! 1. The problem statement, all variables and given/known data A race car driver must average 200km/hr for six laps of the race track to qualify for a race. If he averages only 150 km/h for the first two laps, calculate the average velocity he must have over the last four laps in order to qualify. 2. Relevant equations Vavg = (X2 - X1) / (T2 - T1) 3. The attempt at a solution Set V average = 200 km/hr. 200 = [150+ 4(v)]/6 1200 = 150+4v 1350/4 = V for last 4 laps? 337.5 km/h per lap for the last 4 laps?