问题
单项选择题
A certain theater has 100 balcony seats. For every$2 increase in the price of a balcony seat above$10, 5 fewer seats will be sold. If a11 the balcony seats are sold when the price of each seat is$10, which of the following could be the price of a balcony seat if the revenue from the sale of balcony seats is$1,360 ？（）
A．$12
B．$14
C．$16
D．$17
E．$18
答案
参考答案：C
解析：
设票价增加x美元，则此时少卖了[*]个座位，根据题意可列出下列方程：[*]→x1=6，x2=24所以包厢座位的票价有两个值，分别为16美元或34美元。