i noe x=5 but can someone help me explain how u find y?
http://img407.imageshack.us/img407/8480/51075292pl2.jpg
what is the value of y?
2008-12-20 6:45 am
回答 (4)
2008-12-20 11:43 am
✔ 最佳答案
y/25 = 6/30y = 25 (6/30)
y = 5
x / (x + 20) = 5 / 25
25 x = 5x + 100
20x = 100
x = 5
Do you really delete all your question ?
2008-12-20 1:47 pm
(6 + 14)/6 = 25/y = (20 + x)/x
(6 + 14)/6
= 20/6
= 10/3
10/3 = 25/y
10 = 3(25/y)
10 = 75/y
10y = 75
y = 75/10
y = 7.5
10/3 = (20 + x)/x
10 = 3(20 + x)/x
10x = 60 + 3x
10x - 3x = 60
7x = 60
x = 60/7
(6 + 14)/6
= 20/6
= 10/3
10/3 = 25/y
10 = 3(25/y)
10 = 75/y
10y = 75
y = 75/10
y = 7.5
10/3 = (20 + x)/x
10 = 3(20 + x)/x
10x = 60 + 3x
10x - 3x = 60
7x = 60
x = 60/7
2008-12-20 6:53 am
They both are similar
So
corresponding sides are proportional
x/20 = y/25
ie 5/20 = y/25
= 1/4 = y/25
.'. y = 25/4
= 6.25 units
So
corresponding sides are proportional
x/20 = y/25
ie 5/20 = y/25
= 1/4 = y/25
.'. y = 25/4
= 6.25 units
2008-12-20 6:48 am
X:Y
20:25
Since X=5
X:Y
5:6.25
20:25
Since X=5
X:Y
5:6.25
收錄日期: 2021-05-01 11:39:07
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https://hk.answers.yahoo.com/question/index?qid=20081219224524AAtYJ2c