The cost of making x cakes is given by $(275-3x+x^(2)) . Given the budget of $405, how many cakes can be made?
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Maths 問題~
2012-07-20 5:22 am
回答 (1)
2012-07-20 6:27 am
✔ 最佳答案
The cost of making x cakes is given by $(275 - 3x + x²) . Given the budget of $405, how many cakes can be made?Solution :
275 - 3x + x² = 405
x² - 3x - 130 = 0
(x - 13)(x + 10) = 0
x = 13 or x = -10 (rejected)
Hence, 13 cakes can be made.
參考: fooks
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