SOLUTION: An athlete runs a rate of 3 meters per second around a 400-meter track. Which equation best represents the distance covered if he has already run 2 laps? A. D=400+3s B. D=800+3s

Algebra ->  Test  -> Lessons -> SOLUTION: An athlete runs a rate of 3 meters per second around a 400-meter track. Which equation best represents the distance covered if he has already run 2 laps? A. D=400+3s B. D=800+3s       Log On


   



Question 134609: An athlete runs a rate of 3 meters per second around a 400-meter track. Which equation best represents the distance covered if he has already run 2 laps?
A. D=400+3s
B. D=800+3s
C. D=800+6s
D. D=800-3s

Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
How long is the track? 400
How many laps has the runner already run? 2
The equation is asking for the total distance.
That distance is the distance already run + the distance run as time increases

Distance+=+DistanceRunAtTimeZero+%2B+speed%2At
D+=+%282%2A400%29+%2B+3t
D+=+800+%2B+3t