標題:
F.3 Mathe questions
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發問:
Please to solve the following question. 1. The priices of a moyuse-pad and a file-jacket are $35 and $48 respectively. Mr Lee wants to use $400 or less to buy 10 of them in total and as many file-jackets as possible. How many mouse-pads should he buy?
最佳解答:
你好～～～ 以下都是敝人的一些意見而已，如有錯誤請多多指教！ 1. The priices of a moyuse-pad and a file-jacket are $35 and $48 respectively. Mr Lee wants to use $400 or less to buy 10 of them in total and as many file-jackets as possible. How many mouse-pads should he buy? Solution: Let the mouse-pads he should buy be y. Then, the number of file-jacket he should buy is (10 - y). 35y + 48(10 - y) = 80 / 13 80 / 13 = 6.153846....... Because the number of y must be an integer. So, he should buy 7 mouse-pads. 希望可以幫到你～～～～～ 2010-09-14 20:05:02 補充： Yes, the one that Ken said is the alternative one.
其他解答:
Let x be the numbers of file-jackets that he can buy: 48x+35(10-x)
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