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Jill has 6x red marbles and Ay green marbles. Bill has half as many red marbles
Jill has 6x red marbles and Ay green marbles. Bill has half as many red marbles
游客
2024-01-12
27
管理
问题
Jill has 6x red marbles and Ay green marbles. Bill has half as many red marbles as Jill, but he has twice as many red marbles and green marbles combined as Jill.
Column A Column B
The number of green marbles that Bill has 9x+8y
选项
A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案
C
解析
Jill有6x颗红色弹珠和4y颗绿色弹珠。Bill的红色弹珠数是Jill的一半,但是他的红色弹珠和绿色弹珠数之和是Jill的两倍。比较Bill拥有的绿弹珠数与9x+8y。
解:本题的正确答案为(C)。Bill的红弹珠数应为3x;由题意中得他的绿色弹珠应为:(6x+4y)×2-3x=9x+8y
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