Đáp án:
Giải thích các bước giải:
$3.$
$-4x-5=7-36$
$⇒-4x-5=-29$
$⇒-4x=-24$
$⇒x=6$
$4.$
$a)$ $Ư(-27)=${$27;9;3;1;-1;-3;-9;-27$}
$b)$ 5 $B(-13)=${$-26;-13;0;13;26$}
viết lại câu này theo thì quá khứ như nào ạ.Nga/be late for school/yesterday morning
mọi người giúp em bài này với ạ chương halogen lớp 10 Bài 1. Chỉ từ dung dịch NaCl, hãy viết phương trình phản ứng điều chế các chất sau: Cl2, HCl (các điều kiện cần để phản ứng có đầy đủ). Bài 2. Bằng phương pháp hóa học, nhận biết các dung dịch sau: natri bromua, natri clorua, kali florua, natri iotua. Bài 3. Cho lượng dư dung dịch AgNO3 tác dụng với 250ml dung dịch hỗn hợp gồm NaF 0,15M; NaCl 0,25M và NaBr 0,2M. Viết phương trình hóa học của phản ứng xảy ra và tính khối lượng kết tủa thu được.
: Trong thí nghiệm Y-âng về giao thoa ánh sáng khoảng cách giữa hai khe là 1,5 mm, khoảng cách từ hai khe đến màn là 3 m, người ta đo được khoảng cách giữa vân sáng bậc 2 đến vân sáng bậc 5 ở cùng phía với nhau so với vân sáng trung tâm là 3 mm. Tìm số vân sáng quan sát được trên vùng giao thoa đối xứng có bề rộng 11 mm. A. 9. B. 10. C. 11. D. 12.
Qua văn bản “Buổi học cuối cùng” (An-phông-xơ Đô-đê), em hãy viết một đoạn văn ngắn (khoảng 7 đến 10 dòng) miêu tả nhân vật Phrăng.
trình bày kĩ thuật bón phân cho hoa và cây cảnh
Viết Tất cả đồng phân ancol của C4h10O
trộn 200ml dung dịch HCl 1M với 300ml dung dịch NaOH 1M. Sau phản ứng thu được dung dịch A . Cho Biết dung dịch A làm quỳ tím chuyển màu gì?
1. Which word has the underlined part pronounced differently from others? A. weather B. head C. break D. healthy 2. “_______ is it from here to the nearest post office?” – “About 150 metres.” A. How much B. How long C. How far D. How often 3. You should ¬¬ _______ your helmet whenever you ride a motorbike. A. tie B. fasten C. put on D. wear 4. He got a ticket because he didn’t remember to give a _______ before he turned right. A. hand B. signal C. sign D. light 5. Lan used to _______. A. go to school by foot B. walked to school C. walk to school on foot D. walk to school 6. Which word has the underlined part pronounced differently from others? A. delivered B. watched C. convinced D. laughed 7. There _______ a hospital here, but it has been moved to another part. A. were B. was C. used to be D. used to have 8. Which word has the underlined part pronounced differently from others? A. days B. says C. plays D. stays 9. Which word does not belong to the same group with the others? A. interesting B. boring C. relaxing D. acting 10. Which word does not belong to the same group with the others? A. director B. actor C. horror D. editor 11. _______ is a film that usually features lots of stunts and fighting. A. Action B. Documentary C. Thriller D. Science fiction 12. Which word has the underlined part pronounced differently from others? A. wanted B. provided C. picked D. included 13. Mr Bean’s Holiday is a _______ film. I was laughing from the beginning to the end. A. violent B. scary C. hilarious D. fun 14. We were _______ with the latest film of that director. A. boring B. interested C. bored D. disappoint 15. _______ the plot of the film was good, I didn’t like the main actor. A. However B. Although C. Despite D. When 16. Which word has the underlined part pronounced differently from others? A. studied B. hated C. loved D. listened 17. Many people went to see the movie. _______, it received bad reviews from critics. A. Nevertheless B. Although C. But D. Despite 18. She was so _______ with the book that she couldn’t put it down. A. shocked B. excited C. interested D. bored 19. Not many people like her _______ she is the main actress in the film. A. although B. but C. despite D. however 20. Which word has the underlined part pronounced differently from others? A. booked B. worked C. cooked D. wicked 21. I found the book so _______ that I couldn’t put it down. A. shocking B. gripping C. boring D. tiring 22. She was the major actress in the film _______ she didn’t get much support from audience A. but B. despite C. although D. however 23. Which word has the underlined part pronounced differently from others? A. plays B. pays C. says D. stays 24. Which word has the underlined part pronounced differently from others? A. washed B. relaxed C. jumped D. arrived 25. _______ they spend a lot of money on the film, it wasn’t a big success. A. However B. When C. Although D. Despite 26. Not many people went to see the film. _______, it received good reviews from critics. A. But B. Nevertheless C. Although D. Despite 27. The end of the film was so _______ that many people cried. A. scary B. shocking C. moving D. exciting 28. We found the plot of the film _______ A. disappointing B. disappointed C. acting D. interested 29. There _______ a bus station in the city centre, but it has been moved to the suburbs. A. used to be B. were C. was D. used to have 30. He forgot to give a _______ before he turned left, so he got a ticket. 31. Which word has the underlined part pronounced differently from others? A. played B. opened C. filled D. wanted 32. _______ is a film that shows real life events or stories. A. Science fiction B. Action C. Documentary D. Thriller 33. Which word has the underlined part pronounced differently from others? A. needed B. stopped C. added D. hated 34. “ _______ is it form your house to the nearest bus stop?” – “About 50 metres.” A. How long B. How far C. How much D. How often
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miêu tả hình ảnh mẹ hoặc cha khi em mắc lỗi mn giúp mik với mk ko bt làm bài này
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