30y+20(8-y)<195
30y+160-20y<195
10y<35
y<__

自己計-v-
其他打緊

(i) 根據a 小題的結果﹐ 問小明應購買A和B各多少份﹖﹖
let y be the number of 禮物A that have to buy
therefore
禮物A=____
禮物B=8-禮物A

自己計-v-

(ii) 求小明購買禮物所花的金額。
禮物A x 30+禮物B x 20
=___

自己計-v-

2ai) from2,
y=3x-3---------(3)
sub 3 into 1
.
.
y=___
sub y into (3)
x=___

自己計-v-

(ii) 由(a)(i) 小題的結果﹐解聯立方程
let(a+b)=x-------------(1)
(a-b)=y--------------(2)

再自己計
唔明再問


(iii) 由 (a) (i) 小題的結果
let1/m be x---------------(1)
1/n be y----------------(2)

如(ii)咁自己計
唔明再問

(a) Find the interior angle of the regular pentagon and the interior angle of the regular octagon
用(n-1)x180=_____黎計
唔好話比我知未學過條公式-v-

(b) Find <LFG
interior angle of the regular octagon - the interior angle of the regular pentagon=_____

(c) Find <IJL and the reflex < JLF
<IJL :
180-  the interior angle of the regular pentagon=______

reflex < JLF:
360-the interior angle of the regular pentagon=_____

(d) Find <HIJ in terms of x
=180-x

(e) Find the value of x .
(6-2)x180=<HIJ +reflex < JLF+<IJL +<LFG+2x(interior angle of the regular octagon)
x=_____

*自己加個degree sign上去
唔明再問

[ 本帖最後由 bobbycute 於 2007-5-26 06:04 PM 編輯 ]

(n-2)x180
個條式黎架