find n if, 2.4:n=3:5?
回答 (5)
2008-05-11 4:02 pm
2.4:n = 3:5
2.4 = 3n:5
12 = 3n
n = 12/3
n = 4
2.4 = 3n:5
12 = 3n
n = 12/3
n = 4
2008-05-11 3:46 pm
When you have a ratio a:b = c:d you write the equality of the fractions.
a/b = c/d
Therefore, this ratio is
2.4/n = 3/5
Cross multiply to get
3*n = 2.4*5 = 12
Divide both sides by 3
3*n/3 = n = 12/3 = 4
So
n=4
Good Luck
a/b = c/d
Therefore, this ratio is
2.4/n = 3/5
Cross multiply to get
3*n = 2.4*5 = 12
Divide both sides by 3
3*n/3 = n = 12/3 = 4
So
n=4
Good Luck
2008-05-11 3:42 pm
When you have a ratio a:b = c:d you write the equality of the fractions
a/b = c/d
Therefore, this ratio is
2.4/n = 3/5
Cross multiply to get
3*n = 2.4*5 = 12
divide both sides by 3
3*n/3 = n = 12/3 = 4
a/b = c/d
Therefore, this ratio is
2.4/n = 3/5
Cross multiply to get
3*n = 2.4*5 = 12
divide both sides by 3
3*n/3 = n = 12/3 = 4
參考: Longtime college math teacher
2008-05-11 3:16 pm
just cross mutliply...
n=(2.4 * 5) / 3
n=4
n=(2.4 * 5) / 3
n=4
收錄日期: 2021-05-01 10:30:25
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080511071154AA3deM3