bài 1 : cho pt : x^2-mx+m-1=0 a, giải pt với m=3 b,cmr pt luôn có nghiệm với mọi m c, tìm m để pt có 1 nghiệm lớn hơn 2020?

Viết một đoạn văn nêu quan triển khai luận điểm quan phụ mẫu là một người vô trách nhiệm trong đó sử dụng thành phần trạng ngữ và câu bị động ( Sống chết mặc bay)

26. More and more schools are starting to invest ____ iPads for classrooms, as they see that it can have multiple benefits for learning, even though the investment is quite large. A. for B. to C. in D. at

I. Choose the best answer among A, B, C or D to complete the following sentences. 1. Is this _ coat? A. your B. yours C. you D. your’s 2. You can't have _ cookie. A. mine B. my C. me D. I’s 3. It is turn. A. our B. us C. ours D. our’s 4. Are you sure this book is ? A. yours B. you C. yours D. you’s 5. Look at funny hat. A. she’s B. hers C. her D. him 6. This car is . A. my B. me C. I’s D. mine 7. Charlie and Juan were nervous during _ exams. A. theirs B. their’s C. them D. their 8. only one possible solution for this problem. A. Their B. There’s C. Theirs D. The 9. That ears are huge! A. elephants B. elephant C. elephants’s D. elephant’s 10. The teacher looked at all the work and chose the best picture. A. students B. students’ C. students’s D. student 11. All the uniforms got dirty after playing football. A. boys B. boy C. boys’ D. boys’s 12. My _ birthday is next week. A. brother’s B. brother C. brothers D. brothers’s 13. Sam is my neighbor. Our birthdays are the same day. A. mother’s B. mothers’ C. mothers’s D. mothers 14. My _room is always a mess. A. sister’s B. sister C. sisters D. sisters’s 15. She goes to school with brother. A. hers B. her C. she’s D. she 16. laptop is very expensive. A. You B. Yours C. Your D. You’s 17. Two students didn't do mathematics homework. A. his B. them C. her D. their 18. Nancy is from England. husband is from Australia. A. Her B. She C. Hers D. Her’s 19. Mary loves grandmother. She often visits _. A. her/ she B. her/ her C. hers/ her D. hers/ she 20. Don't put trainers on the bed! A. you B. yours C. hers D. your 21. There’s something wrong with bicycle. A. my B. mine C. I’s D. ours LEVEL B1 I. Choose the correct answer among A, B, C or D to complete the following sentences. 22. car is new. A. Joe and Mary's B. Joe’s and Mary’s C. Joe and Mary D. Joe’s and Mary 23. nails are painted the same color. A. Laurie and Megan’s B. Laurie’s and Megan C. Laurie’s and Megan’s D. Laurie and Megan 24. hair is long. He needs a haircut. A. Chris’s B. Chris C. Chris’ D. Chriss’ 25. That’s not coat. is yellow. A. my/ My B. mine/ My C. my/ Mine D. mine/ My coat 26. My car is old. I want to change . I want to buy one like . A. my car/ yours car B. mine/ your C. mine/ you D. mine/ yours 27. is so beautiful. A. The color of this picture B. Color of this picture C. The picture’s color D. Picture’s color 28. parks at the corner of the street. A. The car of police B. The police’s car C. Police’s car D. The police’s the car 29. is a beautiful lady. A. My boss wife B. The wife of the boss of mine C. My boss’ wife D. My boss’s wife 30. Smith and I bought new cars 2 years ago but needs to be fixed now while still works. A. mine car/ his car B. my car/ his C. my car/ hiss D. mine/ him 31. I am happy to introduce you to a friend of _ . A. me B. my C. mine D. I 32. Excuse me. Could you tell me where the restroom is? A. mens B. mens’ C. men D. men’s 33. My cooking is much better than . A. Chris B. Chris’ C. Chris’s D. Chris cooking 34. That bicycle belongs to one of the . A. boys B. boy C. boys’ D. boys’s 35. Please don't park there. That is the employee of the parking place. A. month B. months C. month's D. months' 36. Last meeting was extremely long and boring. A.week B. months C. week's D. weeks'

Cho tam giác ABC có diện tích là 150m vuông . Nếu kéo dài đáy BC về phía B 5cm thì diện tích sẽ tăng thêm 37,5 cm vuông . Tính đáy BC của tam giác

Câu 1:Cho biết kinh tế nông nghiệp trung và nam mĩ có mấy hình thức sở hữu

M.n giúp mình giải nha mình cần gấp lắm

Trong mặt phẳng Oxy cho các điểm M (2;3) N(4;-1) P( 3;5) lần lượt là các cạnh tam giác ABC hãy lập phương trình đường thẳng chứa các cạnh đó

Cho hàm số y = (x^2-3x+1)/(x-2) và xét các phương trình tiếp tuyến có hệ số góc k = 2 của đồ thị hàm số là:

Giúp với mng nhé 😊😊😊😊 Tìm D biết: D+(x²y - 3y² + 4xyz⁵ + 8) = (7y²+ 6x²y - 2 + 7xyz⁵)