SOLUTION: jeff starts driving at 55 miles per hour from the same point that lauren starts driving at 70 miles per hour. They drive in opposite directions, and lauren has a half-hour head st

Question 116876: jeff starts driving at 55 miles per hour from the same point that lauren starts driving at 70 miles per hour. They drive in opposite directions, and lauren has a half-hour head start . How long will they be able to talk on their cell phones that have a 440-mile range?
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
55T+70(T+.5)=440
55T+70T+35=440
125T=440-35
125T=405
T=405/125
T=3.24 HOURS FROM TIME LAUREN STARTS THEY WILL BE 440 MILES APART.
PROOF
55*3.24+70*3.74=440
178.2+261.8.5=440
440=440
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