Question

（8分）某手机专营店代理销售A、B两种型号手机．手机的进价、售价如下表：

型  号	A	B
进  价	1200元/部	1000元/部
售  价	1380元/部	1200元/部

 

 

 

 

（1）第一季度：用36000元购进 A、B两种型号的手机，全部售完后获利6300元，求第一季度购进A、B两种型号手机的数量；

1.（2）第二季度：计划购进A、B两种型号手机共34部，且不超出第一季度的购机总费用，则A型号手机最多能购多少部？

 

Answer 1

 

1.（1）解：设该专营店第一季度购进A、B两种型号手机的数量分别为x部和y部．····· 1分

由题意可知： ·········································································· 3分

       解得：

答：该专营店本次购进A、B两种型号手机的数分别为15部和18部．··························· 4分

 

2.（2）解：设第二季度购进A型号手机a部．······························································· 5分

由题意可知：1200a+1000(34－a)≤36000，··································································· 6分

解得：a≤10·················································································································· 7分

不等式的最大整数解为10

答：第二季度最多能购A型号手机10部．····································································· 8分

 

解析:略