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还有一道数学题,饿,我郁闷已知正方ABCD的边长是4,点E,F分别在边BC,CD上(不与端点C重合),且AE=AF,设EC=X,三角形AEF的面积为Y(1)试求Y关于X的函数关系式(2)写出X,Y的取值范围要有准确的过程啊 饿`请教几道数学题!1.等腰三角形一腰上的高与另一腰的夹角为50度,则它的底角为_____.2.七巧板所示,一只蚂蚁自由自在地在用七巧板拼成的正方形中爬来爬去(每块七巧板的表面完全相同)他最 3737373737分之1313131313约分后是多少? 2道数学题饿= =、1.如图,已知两等边三角形ABC、DCE,连接AD、BE交于M.求证：BM=AM+CM.2.如图,在直角坐标系中,A的坐标为（a,0),D的坐标为（0,b),且a,b满足{根号（a+2）}+(b-4)^2=0.,求A.D两点坐标.,以A为顶 几道数学题、帮帮饿吧1、当a_____,b______,时,方程组x+y=8有无穷多解ax+3y=b2,当时a_____,b______,方程组x+y=8无解ax+3y=b3.方程组：x+y-z=52x+3y+z=10x-2y-z=20马上期中考试了、 贝尔用英语怎么说 用英语介绍荒野求生.贝爷用英语怎么说啊,拜托.内容最好多一些，谢了~ 英语翻译生活健康小常识1、常吃宵夜.会得胃癌.因为胃得不到休息2、一个星期只能吃四颗蛋.吃太多.对身体不好3、鸡屁股含有致癌物,不要吃较好4、饭后吃水果是错误的观念.应是饭前吃水果 英语选择和完成句子“No one will want to see actors______,"Jack Wanrner predicted.A.talk B.come onC.to talkD.talked她一见到这所房子就喜欢上它了She____ ____ ____ ____the house as soon as she saw it.她想养只宠物猫She wants what do you do when you meet a brazen person?this guy's face is as thick as the Great Wall.when he lose the game,he would like to findexcuses to avoid losing face.He doesn't knowwho he is.he never feels ashame of his losinggames.what should I do? 英语题；选择完成句子Please （look/read) the note carefully when you do not know what to say是怎么意思? What would you say when you meet a friend?1.Nice to know you,2.How are you?3.How do you do woods和forest有什么区别,都是森林的意思 forest什么意思 forest的意思 forest的汉语意思 补全对话,从所给的选项中选择合适句子使文章完整通顺,有两项多余.A.I think it is useful to learn Chinese well.B.Have you ever been to China?C.How long have you been learning Chinese?D.Many times.E.Not very well.F.Me too.G.Whe NEED ANSWERS:Why do people want to marry quick quick quick Discuss with your partner about the need and the importance for people to play sports..英语试题：Name some sports that most youngsters go in for.Discuss with your partner about the need and the importance for people to play sports.这是我们 silent 六级作文出漫画的情况大不大.要是看不懂怎么办. 我是马上进入高二的文科生,用什么参考书合适呢,参考书是用分册的还是总复习的. 开学高二了,我在高一数学150的卷子只能老100分, 我现在高二了 文科生 现在只是数学跟英语很差 现在努力还来得急吗 急 谁给我几句准经典的英语口语`? look,the word "green " ___(spell) "gren"by you.用所给单词适当形式填空 单词“草莓怎样拼写?_____do you _____the word “strawbarry”? 用所给词的适当形式填空.How do you ____(spell) the word? 任何两个数的 最少公约数是不是1?.（0除外） This is a difficult problem(A),but not(B) too difficult problem(C) for them to solve(D)改错题.只有1个错误, 关于和朋友之间一件事作文仿作小学三年级下学期第15课《争吵》,