幫我做下...

2007-06-04 4:33 am
木竿一條長120厘米,髹上紅,綠兩色.紅色佔55%,紅色部分比綠色部分長幾厘米?

4%x3y=0.6,y=?

1佔35%,2佔30%,其餘的是3的14個

幫下我..
更新1:

依有好多..你幫5幫我做啊!!

回答 (2)

2007-06-04 4:41 am
✔ 最佳答案
1.
120 x (55-45)% = 120 x 0.1
= 12cm

2.
4% x 3y = 0.6
0.04x3y = 0.6
0.12y = 0.6
y = 5

3.
a(1-35%-30%) = 14
0.35a = 14
a = 40
(total = 40, 1 有 14, 2 有 12)
2007-06-06 5:25 am
1.

紅 120*0.55=66

綠 120-66=54

66-54=12

2.

0.6/0.4/3=0.5

3.

100-35-30=35

14/0.35=40

1:40*0.35=14

2:40*0.3=12


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