标题: 这道数学题怎么做啊,做了好多遍,感觉没正确答案啊。 [打印本页] 作者: 一生涯凡人也 时间: 2011-2-15 17:24 标题: 这道数学题怎么做啊,做了好多遍,感觉没正确答案啊。 At a certain diner, a hamburger and coleslaw cost $3.59, and a hamburger and french fries cost $4.40. If french fries cost twice as much as coleslaw, how much do french fries cost? (A) $0.30 (B) $0.45 (C) $0.60 (D) $0.75 (E) $0.90