Bài 2: Cho ABC cân tại A, đường cao AH. Trên tia AC lấy điểm M sao cho AC = CM. Kéo dài AH cắt BM tại E. a) Chứng minh rằng: HB = HC. b) Chứng minh rằng: EBC cân. c) Hai đường thẳng AB và CE cắt nhau tại K. Chứng minh rằng: E là trọng tâm của AKM . d) Chứng minh rằng: AM - AB = EM - EB .

tim m để hàm số y=mx^3-3mx^2+(2m+1)x+3-m có cực trị

Giúp e với ạ thỉ cần làm câu 12,13,15,16,19,21,24

Giải giúp mình bài 12,13,14 mik hứa vote 5*,cảm ơn, bình chọn câu trả lời hay nhất ạ!!!!

Rewrite the sentences: 21. It took Mr. Hoang half an hour to walk to work yesterday.  Mr. Hoang spent..................... 22.We started living here fifteen years ago.  We have……………… 23. You shouldn’t eat too much meat. You’d............................................................................ 24.It isn’t necessary for you to set off early.  You don’t……………………………………… 25. Our house is older than any other house in the living centre Our house......................... 26.He failed the exam because of his laziness. Because he…………………………………… 27. There are eight hundred stamps in Hoa’s collection.  Hoa’s collection.............................. 28.Would you mind if I smoked in here?  Do you mind………………………………… 29.His briefcase is red. My briefcase is red, too.  The color of …………………………… 30. The gardenparty won’t take place here if the weather doesn’t improve.  Unless ………………………………………………………………………… help!!!

Giúp mk nhà. Mk cần gấp . Cần trước 21h5p ạ

Giúp mik vs nha mn đang cần gấp >_<

nhanh giúp em lát 10h nộp rồi ạ Viết lại câu, sử dụng cấu trúc so sánh “as…as”. 1. My doll is pretty but her doll is prettier than mine. => My doll ________________________________________________________. 2. Travelling by train is quite exciting but travelling by plane is more exciting. => Travelling by train => ____________________________________________. 3. My salary is high, but my husband’s is higher. =>My salary ______________________________________________________. 4. I am disappointed about my team’s score. Ann is disappointed too. => I___________________________________________________________. 5. It’s warm today, but it was much warmer yesterday. => Today it ________________________________________________________. 6. I still feel a bit tired, but I am better than yesterday. => I don’t feel ______________________________________________________. 7. Tom’s essay is very good and mine is good too. => Tom’s essay _____________________________________________________. 8. The Smiths have lived here for quite a long time, but we’ve lived here longer. => The Smiths haven’t _______________________________________________.

Calli: Mắc mợt Từ sáng tới h làm đc 1 câu mà thấy uể oải quá :vvvv Trang trí có tâm =333 Hóng mí idol nè =33333333333333333

Giải giúp mình bài 12,13,14 mik hứa vote 5*,cảm ơn, bình chọn câu trả lời hay nhất ạ!!!!