Cho tam giác ABC cân đỉnh A. Hai đường cao BD và CE cắt nhau tại H a) C/M: ED vuông góc AH b) Gọi I là trung điểm của AH, K là trung điểm của BC C/M: DI vuông góc với DK

Bài 2 (trang 11 SGK Toán 4): a) Đọc các số sau và cho biết chữ số 3 ở mỗi số đó thuộc hàng nào, lớp nào: 46 307; 56 032; 123 517; 305 804; 960 783.

WRITING: Rewrite each sentence beginning as shown, so that the meaning remains the same. Example: He wrote the letter in two hours. It took him two hours to write the letter. 1. The keepers feed the lions at 3 pm every day. The lions ................................................................................................................................ 2. We got lost because we didn't have a map. If we ........................................................................................................................................ 3. I would prefer you to deliver the sofa on Friday. I would rather......................................................................................................................... 4. The bridge was so low that the bus couldn't go under it. It was ....................................................................................................................................... 5. That was a silly thing to say. What ........................................................................................................................................ 6. We've run out of tea. There........................................................................................................................................ 7. I last saw him when I was a student. I haven't .................................................................................................................................. 8. Susan was too excited to sleep. Susan was ............................................................................................................................... 9. Robert has not had a job for two years. Robert has been ..................................................................................................................... 10. She will complete the work only she is paid extra. She will not ........................................................................................................................

1. I always … at the Albert Heijn on Mondays. (work) 2. I … my homework right now. (do) 3. July … to work at the moment. (drive) 4. Look! I think she … sick. (feel) 5. My grandmother always … to bingo on Wednesdays. (go) 6. She … chocolate very much. (like) 7. I … soccer practice on Tuesdays. (have) 8. I really … your new hair. (like) 9. John … on a project in his room. (work) 10. My dad … always … his guitar for hours. (play) gạch chân từ nhận biết thì.

Mn giúp e bài này vs, e cảm inw nhiều

giúp mình với sẽ cho trả lời hay nhất và 5 sao ạ

Cos^2+cos^2 2x=1+cos^2 3x Sin2x.sin5x=cos11x.cos14x

Mik đang cần gấp giải nhanh hộ mình nhé

Tìm y: a) `-3/5` . `y` = `21/10` b) `y` : `3/8` = `-1``31/33`

Nhờ các bạn giúp mình bài này với.(ctlhn+5 sao) Mình cảm ơn ạ