giúp tôi giải bài này với, cảm ơn trước :)

nhà ông có 4 cây đào .nhà bà có 9 cây đào hỏi tổng có bao nhiêu cây đào

trong hộp có 6 viên bi xanh và 8 viên bi đỏ. ko nhìn vào hộp, hỏi phải lấy ra ít nhất bao nhiêu viên bi để có không ít hơn 3 viên bi xanh và 4 viên bi đỏ

Cho hai biểu thức $A=\dfrac{\sqrt[]{x}+4}{\sqrt[]{x}-1}$ và $B=\dfrac{3\sqrt[]{x}+1}{x+2\sqrt[]{x}-3}-\dfrac{2}{\sqrt[]{x}+3}$ (với $x\geq 0$, `xne 1`) Tính giá trị của biểu thức A khi x=9 Chứng minh $B= \dfrac{1}{\sqrt[]{x}-1}$ Tìm tất cả giá trị của x để $\dfrac{A}{B}\geq\dfrac{x}{4}+5$

Cho 5 đoạn ADN mạch kép có chiều dài bằng nhau thuộc 5 tế bào khác nhau: ADN I : Có A = 2.107; G = 3.107. ADN II : Có A = 3.107; G = 2.107. ADN III: Có A = 10%. ADN IV: Có A = G. ADN V : Gồm toàn bộ A và T. Hãy sắp xếp theo thứ tự đoạn ADN có số liên kết hiđrô nhỏ dần. Giải thích.

Vẽ chữ " Buff " Kí chữ @Ku Nhanh và đẹp mik cho hay nhất

nhà thành có 5 cây chuối,ngày hôm sau,bác hoàng lại nhập thêm 15 cây chuối nữa.hỏi có tổng bao nhiêu cây chuối

help câu 4 vs ae ,hứa vote 5 sao và câu trả lời hay nhất.

2. Change these sentences into reported speech 1. John said to Mary, “I will give you a new bike next summer.” John told ................................ 2. “I’m looking for the book you gave me last week,” Mary said to Peter. Mary told Peter................. 3. Tom said: “I must leave now.” Tom said ................... 4. "I cannot drive you home," he said to her. He said .................. 5. "Peter, do you prefer tea or coffee?" she said. She asked Peter ........ 6. "I will go to the movie with you," he said to me. He promised ................ 7. I asked him: “How do you go to school?” I asked .............................. 8. “Why do you come home late,” James asked him. James asked ...................... 9. He said to me, “Keep a seat for me in the theatre.”  He told me ..................... 10. "Don't play on the grass, boys," she said. She ...................... 11. They said: “We are doing the exercise now.” They said ....................... 12. The police said : “ Don’t touch anything in this room, everybody. ” The police ..................... 13. Mrs. Green said to her friend : “ Can you help my son with his literature ? ” Mrs. Green asked her friend ................................................................................................................................................. 14. “ You shouldn’t translate each sentence into Vietnamese ”, his brother said to me His brother advised me ................................................................................................................................................. 15. “You should learn words and do exercises in order to get good grades”, my teacher said. My teacher advised me ................................................................................................................................................. 16. “ You have to take part in the rice-cooking contest tomorrow”, Nam’s father said. Nam’s father said ................................... 17. “It was raining all day yesterday in Nha Trang”, my pen pal said. My penpal said ...................... 18. “We are waiting for the school bus now”, the children said. The children said ........................... 19. My friend said ,“ I have already written this letter”. My friend said .................. 20. Carol said to me, “I will ask Mr. Wilson about this lesson the next day”. Carol told ................................ 21. Her friend said to her, “I don’t understand these lessons carefully”. Her friend said ........................... 22. Mr. Quang said ,“I must leave right now”. Mr.Quang said ............................... 23. Charles said to Jane, “I have to leave the office before 3.30 pm” Charles told ...................... 24. Helen asked the child, “Are you going to visit your uncle tomorrow ?” Helen asked ........................ 25. She asked her friend, “Do you go to school by bike today ?” She asked her friend .................................. 26. The man said to his daughter, “ Did you feel sick yesterday ?” The man askedd ............................ 27. “Did you go climbing yesterday, Minh”, Mrs. Ngoc asked her son. Mrs. Ngoc asked her son ................................................................................................................................................. 28. Jim asked Laurence, “How many students are there in your class this year ?” Jim asked Laurence .......................... 33. “What was Mr. Minh doing at this time yesterday ?”, Ngoan said Ngoan asked ................. 34. The men asked Mary, “How long have you waited for this doctor ?” The men asked Mary ........................... 35. I said to the salesman, “How much does this dress cost today ?” I asked the salesman .............. 36. They said to her, “Where will your father leave here for the USA ?” They asked her ........................... 37. Minh said, “Which of these pictures do you like best, Mr. Hung ?” Minh asked ............................................ 38. Hang said: “Why doesn’t Ha buy them this picture as a wedding present?” Hang asked ............ 39. “I can’t work at all! My typewriter isn’t working properly,” she said She said ...................... 40. The customer told me, “Can you speak English or French ?” The customer asked me ............................

1. Choose the best answer A, B, C, D 1. Julia said that she ________ there at noon. A. is going to be B. was going to be C. will be D. can be 2. They asked me when _________ . A. did I arrive B. will I arrive C. I had arrived D. I can arrive 3. The farmer said, “ I didn’t see her.” The farmer said ____ her. A. he had seen B. I hadn’t seen C. she didn’t see D. he hadn’t seen 4. Mr Brown said, “I watched TV last night.”  Mr Brown said that he _______ TV the night before. A. was watching B. watched C. had watched D. has watched 5. The teacher said Columbus ________ America in 1492. A. discovered B. had discovered C. was discovering D. would discover 6. Mary said, “ I want to give up my job.” Mary said that ........................... A. she wants to give up her job. B. I wanted to give up her job. C. she wanted to give up my job. D. she wanted to give up her job 7.Mary said ,”I have not seen Peter since last month .” A. Mary said she has not seen Peter since the previous month. B. Mary said she had not seen Peter since the previous month . C. Mary said she was not seen Peter since the previous month. D. Mary said she doesn’t see Peter since the previous month 8. “ I want to go on holiday but I don’t know where to go.” Tom said that ______ A. he wanted to go on holiday but he doesn’t know where to go. B. he wants to go on holiday but he didn’t know where to go. C. he wanted to go on holiday but he didn’t know where to go. D. I wanted to go on holiday but I didn’t know where to go. 9. Mary said : “ What will you do this evening, John ?” A. Mary asked John what would he do that evening. B. Mary asked John what John did that evening. C. Mary wanted to know what she and John would do that evening. D. Mary wanted to know what John would do that evening. 10. He said to them, “Don't tell me such a nonsense!” A. He told them not to tell him such a nonsense. B. He told them to tell him such a nonsense. C. He told them not to tell them such a nonsense. D. He told them to tell them such a nonsense 11. “I don't know what Fred is doing," said my sister. A. My sister said that she didn't know what Fred was doing. B. My sister said she doesn't know what Fred is doing. C. My sister said that I don't know what Fred is doing. D. My sister said that she hasn't known what Fred was doing 12 . “I’ve been playing tennis a lot lately," John said. A. John said that I have been playing tennis a lot lately. B. John said that he has been playing tennis a lot lately. C. John said that he had been playing tennis a lot lately. D. John said that she had been playing tennis a lot lately. 13. The mother asked her son _______. A. where he has been B. where he had been C. where has he been D. where had he been