Mr . Tsang is going to hold two talks at The Hong Kong Exhitbition Centre.Suppose the theatre can accommodateat most 8 000 people. He estimates that if the price for each ticket is $50, then 80% of the tickets will be sold.For every increase of $0.5 in the ticket price, the number of tickets sold will decrease by 25.
(a)Let $x be the price of each ticket and y be the number of the tickets sold.Express y in terms of x.
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thank 咁多位(c)Suppose the price of each ticket in the the second talk is $50, and he estimates 85% of the ticket will be sold . According to the condition stated above , find the maximum possible income in these two talks.
[ scfkipper在2010-12-28 18:13重新編輯此帖 ]