一个小伙子用2000元给MM买了部小米4，留500元吃饭开房，骑着电瓶车去找MM，MM说:你是一个好人，可是我们真的不合适。
改善方案： 一个小伙子用700元在快快租车租了一辆BMW5，然后去批发市场300元买了99朵玫瑰，告诉MM他喜欢手牵手去那些浪漫地方消费了100元。当晚MM就跟他睡了，而且是因为爱情。。。
同时转发到微博电瓶厂投资2000万元安装了电动自行车电瓶流水线，生产的电瓶成本为40元/只，设销售单价为x元（100≤x≤250），年销售量为y万件，年获利为w（万元）．经过市场调研发现：当x=100元时，y=20_百度作业帮
电瓶厂投资2000万元安装了电动自行车电瓶流水线，生产的电瓶成本为40元/只，设销售单价为x元（100≤x≤250），年销售量为y万件，年获利为w（万元）．经过市场调研发现：当x=100元时，y=20
电瓶厂投资2000万元安装了电动自行车电瓶流水线，生产的电瓶成本为40元/只，设销售单价为x元（100≤x≤250），年销售量为y万件，年获利为w（万元）．经过市场调研发现：当x=100元时，y=20万件．当100＜x≤200元时，x在100元的基础上每增加1元，y将减少0.1万件；当200＜x≤250元时，x在200元的基础上每增加1元，y将减少0.2万件．（年获利=年销售额-生产成本-投资）（1）当x=180时，w=______万元；当x=240时，y=______万件；（2）求y与x的函数关系式；（3）当x为何值时，第一年的年获利亏损最少？
（1）当x=180时，w=（180-40）×[20-（180-100）×0.1]-万元；当x=200时，销售量为[20-（200-100）×0.1]=10万件，当x=240时，y=[10-（240-200）×0.2]=2万件；故答案为：-320万元、2万件；（2）①当100＜x≤200时，y=20-0.1（x-100）=-0.1x+30，②当200＜x≤250时，y=10-0.2（x-200）=-0.2x+50，（先把x=200代入y=-0.1x+30得y=10）；（3）①当100＜x≤200时，w=（x-40）（-0.1x+30）-x2+34x-（x-170）2-310，当x=170时，w最大值=-310&&&&&&&&&&&&&&&&&&②当200＜x≤250时，w=（x-40）（-0.2x+50）-x2+58x-（x-145）2+205，∴对称轴是直线x=145，∵-0.2＜0，200＜x≤250，∴在200＜x≤250时，w随x的增大而减小，∵x=200时，w=-400，∴w最大值＜-400，∴综合①、②可知，当x=170元时，w最大值=-310万元．
本题考点：
一次函数的应用．
问题解析：
（1）根据：当x=180时，年获利w=（180-40）×销售量-投资2000万元，销售量=[20-（180-100）×0.1]，求w的值，当x=240时，先求当x=200时，销售量为10万件，再求当x=240时的销售量；（2）①当100＜x≤200时，根据（1）销售量的求法列出函数式，②当200＜x≤250时，先求当x=200时，销售量为10万件，再求出此时销售量的函数关系式；（3）根据售价分段：①100＜x≤200，②200＜x≤250，由（2）找出对应的销售量，再根据：年获利w=（x-40）×销售量-投资2000万元，分别列出函数关系式，利用二次函数的性质求最小值．Mymps error: Can't connect to MySQL server on 'localhost' (10061)
error number: 2003记者昨日从交警部门获悉，从明年元旦起，电动车交通违法将最少被处以100元的罚金，若骑车人“酒驾”则将受到罚款500元的处罚。明年3月，我市有望开始对电动自行车实施“限制挂牌”举措。 的翻译是：Yesterday from the traffic police was informed that as from next year on new year's day, electric vehicle traffic offence will at least be punished by fines of $ 100, if the cyclist "drink drivers" will be subject to a fine of $ 500 penalty. In March next year, the city is expected to start on imple 中文翻译英文意思，翻译英语请在下面的文本框内输入文字，然后点击开始翻译按钮进行翻译，如果您看不到结果，请重新翻译！
记者昨日从交警部门获悉，从明年元旦起，电动车交通违法将最少被处以100元的罚金，若骑车人“酒驾”则将受到罚款500元的处罚。明年3月，我市有望开始对电动自行车实施“限制挂牌”举措。
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罗马尼亚语
罗马尼亚语
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Yesterday from the traffic police was informed that as from next year on new year's day, electric vehicle traffic offence will at least be punished by fines of $ 100, if the cyclist "drink drivers" will be subject to a fine of $ 500 penalty. In March next year, the city is expected to start on imple
Yesterday from the traffic police was informed that as from next year on new year's day, electric vehicle traffic offence will at least be punished by fines of $ 100, if the cyclist "drink drivers" will be subject to a fine of $ 500 penalty. In March next year, the city is expected to start on imple
A reporter from the Traffic Police yesterday was informed that, from next year, New Year's Day will be at least 18,900 won traffic offense liable to a fine of $100, If cyclists "Wine" was the overriding the punishment will be a fine of $500. In March next year, I am city electric bicycles are expect
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