1) The length of a rectangle is twice its width and its perimeter is at most 48cm.Find the greatest possible dimensions of the rectangle.
2) Dicky is given$65 to buy apples and oranges for a birthday party.An apple costs $2,an orange costs $1.5.
(a)Find the maximum and minimum number of fruits he can buy.
(b)Suppose he decides to buy at least 5 of each type of fruit.Find the max. number of fruits he can buy.
吾該幫幫手.....10分
MATHS (Inequalites) o既問題
2007-08-23 1:09 am
回答 (1)
2007-08-23 3:10 am
✔ 最佳答案
1. Let the length of rectangle be L and width be W.Now, L=2W and 2(W+L) less than or equal to 48.
Substitute L: 2[W+(2W)] less than or equal to 48
Therefore, W is at most 8cm and L is at most 18cm.
參考: myself
收錄日期: 2021-04-13 14:39:36
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