这道题是SAT的历年真题这道题是SAT的真题Karl bought x bags of red marbles for y dollars per bag,and z bag of blue marbles for 3y dollars per bag.If he bought twice as many bags of blue marbles as red marbles,then in terms of y,what was the average cost,in dollars,per bag o
2020-02-22
这道题是SAT的历年真题
这道题是SAT的真题
Karl bought x bags of red marbles for y dollars per bag,and z bag of blue marbles for 3y dollars per bag.If he bought twice as many bags of blue marbles as red marbles,then in terms of y,what was the average cost,in dollars,per bag of marbles?(A) (B) (C) 3x-y (D) 2y (E) 6y
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卡尔以每包y美元的价格买了x包红弹珠,以每包3y美元的价格买了z包蓝弹珠.如果他买的蓝弹珠的包数是红弹珠的两倍,那么用y表示,平均每包弹珠的价格是多少美元?买了x包红弹珠,则买了2x包蓝弹珠.均价为：((2x * 3y + x * ...
卡尔以每包y美元的价格买了x包红弹珠,以每包3y美元的价格买了z包蓝弹珠.如果他买的蓝弹珠的包数是红弹珠的两倍,那么用y表示,平均每包弹珠的价格是多少美元?买了x包红弹珠,则买了2x包蓝弹珠.均价为：((2x * 3y + x * ...