Question

Wanda started walking along a path 2 minutes (120 seconds) before Dave. Wanda walked at a constant rate of 5 feet per second. Dave walked along the same path at a constant rate of 10 feet per second. Graph the system of linear equations. If they continue walking at these rates, when will Dave catch up to Wanda?

Answer 1

The solution for the problem:
let x be the travel time of Dave
x + 120 be the travel time of Wanda

using the distance formula which is: speed * travel time = distance (which will be the same for both Wanda and Dave)

10x = 5(x+120)
10x = 5x + 600
5x = 600x = 120

Dave will catch up after 120 seconds.