题目信息
Last month a certain music club offered a discount to preferred customers. After the first compact disc purchased, preferred customers paid $3.99 for each additional compact disc purchased. If a preferred customer purchased a total of 6 compact discs and paid $15.95 for the first compact disc, then the dollar amount that the customer paid for the 6 compact discs is equivalent to which of the following?
A:5(4.00) + 15.90
B:5(4.00) + 15.95
C:5(4.00) + 16.00
D:5(4.00-0.01) + 15.90
E:5(4.00-0.05) +15.95
参考答案及共享解析

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本题耗时:
已选答案:
正确答案:
A:5(4.00) + 15.90
*考点:计算
*解析:
15.95(首张光盘的价钱)+5*3.99(即19.95,第二张到第六张的价钱)
选项中 第一项把15.95 减去0.05,即15.90
第二项加上0.05 即从5*3.99(19.95)变成 5*4.00(20.00)
所以公式 5*4.00+15.90 是A正确的


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