受地震的影响，某超市鸡蛋供应紧张，需每天从外地调运鸡蛋1200斤．超市决定从甲、乙两大型养殖场调运鸡蛋，已知甲养殖场每天最多可调出800斤，乙养殖场每天最多可调出900斤，从两养殖场调运鸡蛋到超市的路

题干

受地震的影响，某超市鸡蛋供应紧张，需每天从外地调运鸡蛋1200斤．超市决定从甲、乙两大型养殖场调运鸡蛋，已知甲养殖场每天最多可调出800斤，乙养殖场每天最多可调出900斤，从两养殖场调运鸡蛋到超市的路程和运费如表：

（1）若某天调运鸡蛋的总运费为2670元，则从甲、乙两养殖场各调运了多少斤鸡蛋？

（2）设从甲养殖场调运鸡蛋x斤，总运费为W元，试写出W与x的函数关系式，怎样安排调运方案才能使每天的总运费最省？

上一题下一题 0.0难度选择题更新时间:2019-08-02 05:02:58

答案(点此获取答案解析）

解：（1）设从甲养殖场调运鸡蛋x斤，从乙养殖场调运鸡蛋y斤，根据题意得：

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Ben	I'm in Grade 7 in Macross City. I have too much homework. I usually spend more than two hours on homework every day. I don't use the Internet to help with my homework
Linda	Hi! I live in New York. I'm in Grade 6. I guess I'm lucky, because I don't have too much homework. I usually finish my homework in an hour. I don't use the Internet for homework. My brother will come to help me if I have problems with my homework.
Jack	I'm in Grade 8. I usually spend less than an hour on my homework. I sometimes use the Internet to find information about homework. I don't think my homework is too much.