Karen is going to buy althogether 8 gift sets A and B for her friends . The
prices of gift sets A are $30 each and those of gift sets B are $20 each . It is
known that Karen wants to buy as many gift sets A as possible for not more
than $195.
i) According to the result of (a),how many gift sets of each kind should Karen buy? a系:30y+20(8-y)≦195,y≦3.5
ii) How much does Karen spend on this gift seys?
F.2 MATHS (easter hw)
2008-03-25 2:28 am
回答 (1)
2008-03-25 3:34 am
✔ 最佳答案
i) let karen buy x set A, (8-x) set B30x+(8-x)20 < or = 195
30x+160-20x < or =195
10x<or = 35
x< or = 3.5
x should be 3.
therefore , she should buy 3 setA and 5 setB
ii) the amount=3x30+5x20=190
收錄日期: 2021-04-29 20:26:57
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