how to do thes kind of mathz question?
2008-03-28 1:23 am
A topyshop purchased 450 comics cards for $550 and 25 of them were damaged. Then the shopkeeper sold the rest for $y each. If the profit [er cent was not less then 70% , find the range of vaules of y.
回答 (1)
2008-03-28 2:48 am
✔ 最佳答案
(450 - 25) x y - 550 < 550 x 70%425y - 550 < 385
425y < 935
y < 935 / 425
y < 2.2
參考: me
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