跟我解题我重赏！！

来源：百度知道 编辑：UC知道 时间：2024/07/04 12:20:48
～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～
Find the square roots of the following.

(a) 1又9分之7
(b) 25x二次方
(c) 81分之16平方根 乘于x二次方
～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～
Paul gets some 20-dollar notes and 50-dollar note.It is known that he has $360 and the number of 20-dollar notes is greater than that of 50-dollar notes by 4.Find the number of 20-dollar notes.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
When Vincent visited the Great Wall of China,he said,"The average height of the Great Wall plas 1.2m should be six times of my height.'If Vincent's height is 1.5m,find the average height of the Great Wall.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
There are three ink bottles and eight pens.The weight of an ink bottle is 4 time that of apen.If all of the items are 1000g in weight,how heavy is an ink bottle?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Louis's sister p

第一题：求平方根
(a)9分之7=16/9,平方根为4/3
(b)方=625x^,平方根为25x
(c)分之16平方根乘于x二次方=4x^/9,平方根为2x/3
第二题：
设50美元有x张，则20美元有(x+4)张,得
50x+20(x+4)=360
解得x=4
所以20美元8张
第三题：
题中的plas我不懂意思，估计是加或减，但字典上又找不到这个词，另请高手吧
第四题：
设一支钢笔重为y,则一瓶墨水重4y,得
3*4y+8*y=1000
解得y=50
所以一瓶墨水重200克
第五题：这题有两种结果(1.利滚利；2.非利滚利)
设路易丝存入银行z美元
1.z*(1+16%)^=660
解得z=490.5(四舍五入得)
露易丝存入银行490.5美元
2.z+z*16%*2=660
解得z=500
露易丝存入银行500美元

看不懂呀。