Two families are vacationing together, driving in separate cars. The Harris family averages 40 mph, leaving Hometown 12 minutes ahead of the Arlen family, who averages 55 mph. How long will it take the Arlen family to overtake the Harris family?

Question

neonumbrella5115 · Answer

I would write two separate equation for each family.  With the slope as the mph and the y intercept for the Harris family as 12 and the y intercept of the Arlen family as 0.  What would those two equations be?

anonymous · Answer

Harris: 12=40x+b
Arlen: 0=55x+b