easy!!!!
2007-10-24 2:47 am
1.May went to the ocean park by bus with her mother,father,brother and sister.the ages of May,her brother and her sister are 11,7 and 9 respectively.they paid a total of $21 for the bus ride.if all children under 12 pay half-fare.find the fare of an adult
回答 (2)
2007-10-24 3:14 am
✔ 最佳答案
Let the fare of an adult be $a Thus, the fare of a child is $ 0.5a
There are 3 adults and 3 children
Thus, 2 * a + 3 * 0.5a = 21
3.5a = 21
a = 21 / 3.5 = 6 ($) (ans.)
ans. The fare of an adult is $6.
2007-10-23 19:15:33 補充：
Correction:should be (there are 2 adults and 3 children)......
2007-10-24 3:16 am
Each child would have to pay $21/3=$7 per ride.
Therefore, an adult has to pay $14 per ride.
Therefore, an adult has to pay $14 per ride.
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