giải hộ pt này ạ không viết tắt nha

lấy dẫn chứng trên phương diện chữ viết để chứng minh Việt nam là nơi văn minh Đông - Tây hội ngộ giúp em trả lời câu này với ạ

Tìm Max f(x,y) = 2012 - 2x^2 - y^2 + 2xy -10x + 14y

2.6 TAG QUESTIONS I . Add tag questions to the following 1.Your name is Thanh , ……………………………….. ? 2. Today is Sunday , ……………………………….. ? 3. John doesn’t agree with me about the plan , ……………………………….. ? 4. There’s a bus comimg , ……………………………….. ? 5. Everybody was saying their prayers in the church when I cane in, ………………….. ? 6. He makes a lot of mistakes in pronunciation , ……………………………….. ? 7. The traffic was heavy yesterday , ……………………………….. ? 8. Both men won’t surf the Internet for a chat any more , ……………………………….. ? 9. A lot of students don’t think studying grammar is interesting , ……………………….. ? 10. We haven’t done this homework yet , ……………………………….. ? 11. Jack’s enrolled on this course , ……………………………….. ? 12. Helen’s got fashionable clothes to wear on this important occasion , ………………? 13. The Smiths have got a computer , a CD player and two motorbikes , ……………… ? 14. The children have many computer games to play , ……………………………….. ? 15. Your brother has the chance to speak English outside the classroom , ……………… ? 16. David and Kate aren’t going to pay their school fees tomorrow , …………………….. ? 17. There weren’t any well- qualified teachers at this school , ………………………….. ? 18. This boy could use a computer at the age of 5 , ……………………………….. ? 19. MY father put an advertisement in the Times to sell his house , …………………….. ? 20. It is expensive for you to access the Internet , ……………………………….. ? 21. Jim really shouldn’t spend most of his time wandering on the Internet , ……………… ? 22. People don’t know which website is useful to them , ……………………………….. ? 23. Students have to wear uniforms in Vietnam , ……………………………….. ? 24. Email is good way for people to communicate , ……………………………….. ? 25. The garbage can be taken out everyday , ……………………………….. ? 26. We must send this message by email , ……………………………….. ? 27. You wouldn’t like another drink , ……………………………….. ? 28. Vinh would rather listen to English programs on the radio , ………………………….. ? 29. You had better not go out in the cold weather , ……………………………….. ? 30. Ba ought to join her family on a day trip to her hometown , ……………………….. ? 31. My sister might like writing email , ……………………………….. ? 32. You should attend the opening ceremony , ……………………………….. ? 33. You wouldn’t mind helping me with this , ……………………………….. ? 34. I needn’t say anything to you about it , ……………………………….. ? 35. Your aunt needs to grow rice on his farm , ……………………………….. ? 36. This is Mr. Johnson , ……………………………….. ? 37. That was Ann on the phone , ……………………………….. ? 38. Those weren’t your parents over there , ……………………………….. ? 39. These are your cases here , ……………………………….. ? 40. The Chinese invented paper in AD 105 , ……………………………….. ?

hiện tượng tắc nghẽn giao thông có ảnh hưởng như thế nào đối với môi trường?

Giúp mình giải chi tiết câu này

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Vẽ anime buồn or khóc NL : Toy lỡ làm ai đó giận rồi pk hông ??? Cho toy xin lỗi mà ..........U.U Nhành hoa rụng rơi Nhẹ nhàng như đôi chúng ta xa rời :(

Một mảnh hình chữ Nhật nếu mỗi cạnh tăng 25 phần trăm thì diện tích tăng 225cm2 tính diện tích ban đầu

giúp tui với tui hôm nay phải nộp chấm điểm rồi