(第8期 提高卷 1)若直线5x+4y=2m+1与直线2x+3y=m的交点在第四象限,则m的取值范围是?

胡子一大把2022-10-04 11:39:543条回答

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黄屁 共回答了21个问题 | 采纳率95.2%
凡是函数,不管什么函数,要求交点,就是把两个函数式联立起来,解方程组.
即:求函数交点就是解方程组!
由于函数中有字母m ,因此解答出来的x(横坐标)和y(纵坐标)都是含有m的代数式.
解得x = (2m + 3)/7 ,y =(m - 2)/7
x表示横坐标 ,y表示纵坐标,由于交点在第四象限,所以有横坐标x大于零,纵坐标y小于零,
再解答不等式组x = (2m + 3)/7 >0
y = ( m - 2) /7
1年前
如果没爱 共回答了17个问题 | 采纳率
10X+8Y=4M+2 即10X=4M+2-8Y
10X+15Y=5M 即10X=5M-15Y
代入:4M+2-8Y=5M-15Y即M=7Y+2 M-2〈 0
又15X+12Y=6M+3即12Y=6M+3-15X
8X+12Y=4M即12Y=4M-8X
代入6M+3-15X=4M-8X即2M=7X-3
所以2M+3> 0
所以-3/2

1年前

2
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搞点分用用!!!!!!!!!搞点分用用!!!!!!!!! 楼上有答案。
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初一英语第8期报纸(总3056期)第二版的XII书面表达
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索尼娅很喜欢收藏文具(stationery),她的藏品有各种颜色的尺子、铅笔和钢笔,各种各样的橡皮、铅笔刀、笔记本和铅笔盒.除此之外,她还有一本词典.运用所学的词汇和句型,介绍一下索尼娅 的收藏品.
要求;1、叙述条理,符合逻辑
2、用词得当,语法正确.
3、书写整齐、规范
4、不得少于50词
(找网文用翻译器翻译 .)
禁止抄袭:
I have a friend called Sonia, she likes to collect Stationery ( stationery ), her collections with various colors of the rulers, pencils and pens, all kinds of rubber, pencil sharpener, notebook and pencil box. Besides, she has a very nice dictionary.
这篇,老师说这篇不合格 . 拜托 ~ 急用纳
梦雪儿3331年前1
种云飞 共回答了19个问题 | 采纳率73.7%
One possible version:
Sonia likes to collect stationery. She has a great stationery collection. She has a lot of rulers, pencils and pens of different colors. She has many different kinds of erasers and pencil sharpeners, too. And there are lots of notebooks and pencil cases in her collection. She also has a dictionary. When she reads, the dictionary can help her.
请问有没有2013-2014学年度英语测试报第4期~第8期的答案,
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亲,你问的他过于笼统了
英语周报四川外研版高二 第8期 高二英语上学期期中阶段检测答案.
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参考答案
1-5 BCAAB 6-10 BCCBC
11-15 CAACB 16-20 AACCB
21-25 CCBAB 26-30 DDCCB
31-35 CDAAB 36-40 BACBA
41-45 DCBDD 46-50 CBADC
51-55 AADCB 56-60 ACCDA
61-65 CBACA 66-70 BBCCD
71-75 ACGFD
76.Successful People Think Independently/ Successful People Seldom Follow Others
77.Because they could not find the right way to the food.
78.fall
79.Because it seems easier to follow the main stream than to deal with the challenge independently.
80.I must think by myself and decide what is the right thing for me to do instead of just following others.
短文改错:
81....the best friend.the → a
82....feeling kind of boring ...boring → bored
83....have many to talk ...many → much 或many后加things
84.My mother always have ...have → has
85....is worth kept.kept → keeping
86....invite my friends ...friends → friend
87....instead just sitting ...instead后加of
88....it actual worked.actual → actually
89....have a lot on common ...on → in
90....so our friendship ...去掉so
One possible version:
Dear Sir / Madame,
My name is Li Hua.I am writing to apply for the position as the English announcer of our school Radio Station.I think I’m qualified for this position for several reasons.First,I have been dreaming of working as an announcer since my childhood.I read a lot of English books and magazines in my spare time,so I am familiar with various topics.Second,I can speak English fluently and clearly.Besides,I am outgoing and optimistic,which makes it easy for me tocommunicate and cooperate with others.I hope to have a chance to work for the school Radio Station in my spare time.I would appreciate it if you would consider my application favorably.I am looking forward to receiving your early reply.
Yours sincerely,
Li Hua
高二英语周报第8期完形There was a boy that dreamt of becoming the world
高二英语周报第8期完形
There was a boy that dreamt of becoming the world’s best violinist.To achieve his life goal,he traveled to a faraway land where the famous and best violinist of all time (16).
sparkle20051年前2
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36~40BBDAA 41~45DDBAC 46~50BBACD 51~55ADBCC
八年级英语小报,第8期笔试部分答案
看山是山7101年前1
FirstID 共回答了19个问题 | 采纳率78.9%
1-15:BAACC ACBCB ABBCC 16-30:CABAC BCDBA DDBDA
31-45:BCADC DABCA BCDBA 46-60:DCBAD ACDBC CADBB
61-75:CADBA CDBDA DADAC

76-83 :
热烈→暖
是背后的增加或删除的
为→从

累人累→
因此→因为
希望→绝望
人→有
取出
我→我们
2008-2009 初一英语辅导报答案第8期 Module2 Unit6 同步验收答案 急
zenick1年前1
bettygrace 共回答了17个问题 | 采纳率94.1%
我将拼命揉折这不祥的树身
约瑟,带着廉价菸草的味儿,站在岸上.
惨白的雕像──有着一根灰色脚趾
挂在光秃的钩子上.多年以后
借问长者欲何往
故事早在的始就已是结果哈哈