Airline Ticket Price A charter airline finds that on itsSaturday flights from Philadelphia to London all 120 seatswill be sold if the ticket price is $200. However, for each$3 increase in ticket price, the number of seats sold decreasesby one.(a) Find a formula for the number of seats sold if the ticketprice is P dollars.(b) Over a certain period the number of seats sold for thisflight ranged between 90 and 115. What was the corresponding range of ticket prices?

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter1: Equations And Graphs
Section1.7: Solving Inequalities
Problem 85E
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Airline Ticket Price A charter airline finds that on its
Saturday flights from Philadelphia to London all 120 seats
will be sold if the ticket price is $200. However, for each
$3 increase in ticket price, the number of seats sold decreases
by one.
(a) Find a formula for the number of seats sold if the ticket
price is P dollars.
(b) Over a certain period the number of seats sold for this
flight ranged between 90 and 115. What was the corresponding range of ticket prices?

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