Question

You plan to go from Portland to Tucson. Let x be the distance in miles of any flight between Portland and Tucson.
a. What is a true statement about the mileage of any route from Portland to Tucson? Assume that no route visits the same city more than once and that each route has no more than one layover.
b. How many routes exist between Portland and Tucson? What are they? Which route is the shortest?
c. Can you write an inequality that represents the mileage of any route between Portland and Tucson?