某学校为了绿化校园环境,计划分两次购进樟树和桂花树两种树苗,第一次购进樟树苗20棵,桂花树苗10棵,共花费3000元:第二次购进樟树苗24棵,桂花树苗8棵,共花费2800元.(两次购进的两种树苗各自的单价均不变)
(1)两种树苗的单价分别是多少元?
(2)学校准备再次购进两种树苗共40棵,但总费用不超过3800元,且购买樟树苗的数量不超过桂花树苗数量的3倍、问:共有哪几种购买方案?
(1)两种树苗的单价分别是多少元?
(2)学校准备再次购进两种树苗共40棵,但总费用不超过3800元,且购买樟树苗的数量不超过桂花树苗数量的3倍、问:共有哪几种购买方案?
更新时间:2023-10-07 18:19:44
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【推荐1】疫情期间,某学校准备购进一批红外线测温仪和口罩若干包.已知购买
个红外线测温仪和
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个红外线测温仪和
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(1)求一个红外线测温仪和一包口罩的售价各是多少元?
(2)学校准备购进红外线测温仪
个,口罩若干包(超过
包).某药店对这两种商品给出优惠活动,活动一:购买
个红外线测温仪送
包口罩;活动二:购买口罩
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①设购买口罩
包,选择活动一的总费用为
元,选择活动二的总费用为
元,请分别求出
与
的函数关系式;
②学校计划购买
包口罩,选择活动一和活动二哪个更省钱?请说明理由
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(1)求一个红外线测温仪和一包口罩的售价各是多少元?
(2)学校准备购进红外线测温仪
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①设购买口罩
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②学校计划购买
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【推荐2】我校举办了首届“数学展示”活动,为表彰在本次活动中表现优秀的学生,老师决定购买笔袋或彩色铅笔作为奖品.已知1个笔袋、2筒彩色铅笔原价共需44元;2个笔袋、3筒彩色铅笔原价共需73元.
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(2)正巧商家举行“优惠促销”活动,具体办法如下:笔袋“九折”优惠;彩色铅笔不超过10筒不优惠,超出10筒的部分“八折”优惠.若买
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【推荐1】2022年在北京举行的第
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成本(元![]() | ![]() | ![]() |
售价(元![]() | ![]() | ![]() |
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【推荐2】用1块
型钢板可恰好制成2块
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型钢板;用1块
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型钢板和3块
型钢板.
(1)若需14块
型钢板和12块
型钢板,则恰好用
型钢板、
型钢板各多少块?
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、
型钢板共50块,并全部加工成
、
型钢板,要求
型钢板不超过86块,
型钢板不超过90块,求
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型钢板的购买方案共有多少种?
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型钢板每块利润为100元,
型钢板每块利润为120元,则全部售出
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