Cho tam giác ABC, G là trọng tâm,M là trung điểm của BC.K là điểm đối xứng với M qua B .I là điểm đối xứng với G qua C. E thuộc AB sao cho 4AE =3AB. Biểu diễn vecto KI theo vec to IM và AB

Tính bằng cách thuận tiện nhất 4/5 x 3/7 x 4/5 x 6/7 - 4/5 x 4/14

nhanh nha giup với hehehehehehehe

Câu 3: ( 2 điểm): Từ việc đọc hiểu văn bản “Cô Tô", em hãy nêu ngắn gọn một vài suy nghĩ và hành động để bày tỏ tình cảm của mình đối với đất nước, quê hương. Câu 4: ( 1 điểm) Phát hiện lỗi sai và sửa lại cho đúng: 1. Bạn Linh, lớp trưởng mà chúng tôi yêu quý nhất. 2. Mỗi lần trở lại trường xưa. Giải giúp e bài 3,4 với ạ

dạ giúp được em came ơn rất nhiều ạ

Cho tam giác ABC cân tại A. Các tia phân giác của góc A và góc B cắt nhau tại O. Biết OA = 2√3cm, OB = 2cm. Tính độ dài cạnh AB

Giúp bài 1 Ghj#%@-@+#+(#;#;12341231';;{¢{£{£

Ex2: Choose the sentence that is closest in meaning to each sentence below. 1. "Where did you go last night"? she said to her boyfriend. A. She asked her boyfriend where he had gone the night before. B. She asked her boyfriend where he went the night before. C. She asked her boyfriend where had he gone the night before. D. She asked her boyfriend where did he go last night. 2. "Remember to write to your aunt". I said to Miss Unit. A. I said to Miss Linh remember to write to her aunt. B. I said to Miss Linh to remember to write to her aunt. C. I told Miss Linh remember to write to her aunt. D. I reminded Miss Linh to write to her aunt. 3. "How long have you lived in Hanoi?" said my friend. A. My friend asked me how long have I lived in Hanoi. B. My friend asked me how long had I lived in Hanoi. C. My friend asked me how long I had lived in Hanoi. D. My friend asked me how long I have lived in Hanoi. 4. "Close the books, please" said our teacher. A. Close your book said by our teacher. B. Our teacher asked us close our book. C. Our teacher said us close our book. D. Our teacher asked us to close our book. 5. "I didn't break your watch" the boy said. A. The boy told the girl that he hadn't broken her watch. B. The boy asked the girl that he hadn't broken her watch. C. The boy told the girl that he didn't break her watch. D. The boy told the girl that he hadn't broken your watch. 6. Don’t make noise because I am listening music now" he said to me. A. He asked me not to make noise because I am listening music now. B. He asked me not to make noise because I was listening music then. C. He asked me not to make noise because he was listening music then. D. He asked me to make noise because I was listening music then. 7. "I have just seen your mother this morning". Laura said to Lewis. A. Laura told Lewis I have just seen your mother this morning. B. Laura told Lewis she had just seen his mother that morning. C. Laura told Lewis she has just seen his mother that morning. D. Laura told Lewis he had just seen her mother that morning. 8. "We are ready to come with our friends" they said. A. They told us they are ready to come with their friends. B. They told us they were ready to come with our friends. C. They told us we were ready to come with our friends. D. They told us they were ready to come with their friends. 9. "I was intending to meet you tomorrow" she said. A. She told me she was intending to meet me tomorrow. B. She told me she had been intending to meet me the next day. C. She told me she had been intending to meet me tomorrow. D. She told me she had intending to meet me the next day. 10. Mrs Smith: "Don't play in front of my windows" A. Mrs Smith told us not to play in front of her windows. B. Mrs Smith told us not to play in front of my windows. C. Mrs Smith told us to not play in front of her windows. D. Mrs Smith said us not to play in front of her windows.

Giải cho em với ạ em đang cần gấp ạ

cho số hữu tỉ x= -5/a-7 với giá trị số nguyên nào của a thì x là số nguyên