93 V2..有一题是JJ上的,补充一下,说某人买了100条dress和150条boluche,总共$15500,average price of dress is $30 more than boluche. If sell these dress and boluche at a price 60% higher than the cost. What is the average price of a dress and a boluche. 我选208 欢迎讨论 我得104 ? 100(b+30)+150*b=15500 so, boluche=50 dress=80 average price = (50+80)*1.6/2=104
93 V2..有一题是JJ上的,补充一下,说某人买了100条dress和150条boluche,总共$15500,average price of dress is $30 more than boluche. If sell these dress and boluche at a price 60% higher than the cost. What is the average price of a dress and a boluche. 我选208 欢迎讨论 我得104 ? 100(b+30)+150*b=15500 so, boluche=50 dress=80 average price = (50+80)*1.6/2=104
V2. DS: what is the value of |x+5| (1)|x-5|=10 (2)|x|-5=10、 我选了C。 同意,题意不再是能否判断,而是求|x+5|的值,必须结合两个条件才可以 ==================================================== 0.0