英语数学题求解if x percent of 500 is y,what is y percent of 10x?A.50xB.（x^2）/2C.2/5xD.5(X^2)E.(x^2)/5英语不会求翻译附带求详解~~

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英语数学题求解~~if x percent of 500 is y,what is y percent of 10x?A.50xB.（x^2）/2C.2/5xD.5(X^2)E.(x^2)/5英语不会求翻译~~附带求详解~~
英语数学题求解~~
if x percent of 500 is y,what is y percent of 10x?
A.50x
B.（x^2）/2
C.2/5x
D.5(X^2)
E.(x^2)/5
英语不会求翻译~~附带求详解~~

英语数学题求解~~if x percent of 500 is y,what is y percent of 10x?A.50xB.（x^2）/2C.2/5xD.5(X^2)E.(x^2)/5英语不会求翻译~~附带求详解~~
if x percent of 500 is y,what is y percent of 10x?
如果500的x%是y,那么10x的y%是多少?
x percent of z is y,这个短语举例来说,10 percent of the population is 1530 人口的10%是1530
由题得
①500 * x% = y
②10x * y% = ?
由①得 y = 500 * x /100 = 5x
带入② 10x * 5x /100 = 50x^2 /100 =（x^2) /2
∴选B
A.50xB.（x^2）/2C.2/5xD.5(X^2)E.(x^2)/5

原题翻译：如果 500的x%是y，那么10x的y%是多少？由题意得：500*x%=y解之y=5x10x*y%=10x*5x/100=(x^2)/2答案为B

如果 500的x%是y，那么10x的y%是多少？
由条件可得500*x%=y
即500*x/100=y
5x=y
那么10x*y%=10x*5x/100=1/2(x^2)
选择B
望采纳~~

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