gbu94mz95e的部落格

標題:

• 請問咩叫 "I don't give a Damn" 呀-
• 25,37,49 key 既midi keyboard有乜分別-
• 這個問題是31,28,26,22的英文....................... 我唔記得.

• 請問咩叫 "I don't give a Damn" 呀-
• 25,37,49 key 既midi keyboard有乜分別-
• 這個問題是31,28,26,22的英文....................... 我唔記得.

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急!maths ratio!

發問:

Kitty has $1 and $5 coins in her pruse.The ratio of the number of $1 coins to that of $5 coins is 3:1 . If she has a total of $32 , find the total value of the $5 coins.

最佳解答:

Let there be (n) $5 coins 5n + 3n = 32 8n = 32 n = 4 There are 4 $5 coins 5 x 4 = 20 // The total value of the $5 coins is 20 2007-04-10 20:02:48 補充： The total value of the $5 coins is $20 2007-04-10 20:05:19 補充： The ratio of the number of $1 coins to that of $5 coins is 3:1It means that the numbr of $1 coins is three times that of $5 coins Therefore 1 x 5n + 3 x 1n = 32i.e. 5n + 3n = 32

其他解答:

$32 x (1x5) / (3x1+1x5) =$20