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4592
1#
發表於 14-7-13 20:57 |只看該作者 |倒序瀏覽 |打印
想請教高人幫手~謝謝~  (列出step &answer)

1. if  the root of the equation y/2-3=3 is k, find the value of k.
    k =?

2.in the factory, the cost $c of producing a skirt can be calculated by the formula c =38+50/n,
   where n is the number of skirt produced.
a) find the cost of a skirt if 100 skirt are produced.
b) find the total cost of producing the skirts if 200 skirt are produced.
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3280
2#
發表於 14-7-13 22:42 |只看該作者
請問是中幾的問題

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janetlam74  升中一,我數唔得幫唔到阿仔,佢試做完問我岩唔岩...........我唯有問高人~  發表於 14-7-13 23:41

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4117
3#
發表於 14-7-13 23:09 |只看該作者
1) y/2 - 3 = 3
y/2 = 6
y = 12
The root of the equation is 12, so k = 12.

2a) c = 38 + 50/100
c = 38.5
The cost of 1 shirt is $38.5.

2b) c = 38 + 50/200
c = 38.25
200 × 38.25 = 7650
The total cost is $7650

點評

janetlam74  我有野唔明: 為何2a)唔使乘100,但2b)乘200?謝謝  發表於 14-7-13 23:46
janetlam74  萬分感謝^^  發表於 14-7-13 23:42

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3280
4#
發表於 14-7-13 23:59 |只看該作者
亞仔解答說:.a是問一件衫的價格.b是問全部衫的價格.希望幫到妳

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janetlam74    發表於 14-7-14 00:00
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