1. a,x+1/2=8/x+1 b,x+1/2014+2/2013=x/2+1006 2. xy-x=2y=3 tinh ti so A/B biet A=34/7.13+51/13.22+85/2237+68/37.49 va B=39/7.16+65/16.31+52/31.43+26/43.49 3. a,Ix-3I=I3x-1I 4, M=2-5+8-11+14-17+...+98-101 a,tinh gia tri cua M b,Viet dang tong quat cua so hang thu n cua M lam nhanh ho mik!

16 Tính giá trị của biểu thức: (1234 - 25 x 4 : 2) x (45 – 15 x 3) 17 Dãy số 1; 2; 3; 4; 5;… 43; 44; 45 có bao nhiêu chữ số. 18 Tính nhanh tổng sau: 1,1 + 2,2 + 3,3 + 4,4 +……8,8 + 9,9 19 Một HCN nếu giảm chiều dài đi 5m thì nó trở thành hình vuông có chu vi là 36m. Tính diện tích HCN ban đầu. 20 Có 20 công nhân cùng làm một công việc trong 15 thì xong. Sau khi cùng làm được 3 ngày thì có 8 công nhân điều chuyển việc khác. Hỏi số công nhân còn lại làm tiếp bao nhiêu ngày nữa thì xong công việc đó. 21 Hai kho chứa 180 tấn thóc. Nếu chuyển từ kho 1 sang kho 2 là 12 tấn thóc thì số thóc ở kho 1 bằng 4/5 số thóc ở kho 2. Hỏi lúc đầu mỗi kho có bao nhiêu tấn thóc? giải thích nha

Mình làm câu b) như này đúng chưa nhỉ

MK CẦN CỰC KÌ GẤP MONG CB GIÚP MK Ạ :======(

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A. How do you go to school? B. When do you go to school? C. What do you go to school? D. Where do you often go? I go school by bike

Tam giác `ABC` đều có cạnh bằng `a`, `M` thuộc `BC`, `BM = 2MC`. Tính độ dài `\vec{AM}`

Giải cho mình câu 4 thôi nhé làm bài ngắn thôi

GIÚP MÌNH VS Ạ MÌNH CẦN CẢ BÀI GIẢI Ạ

20. of the companies supports a local charity. A. Each B. All C. Most D. Half my mother nor my aunt likes going shopping. B. Most C. Neither D. Both 21. A. Either 22. of us wants to remind about that accident. A. Either B. Both C. Most D. Neither 23. "She doesn't want to criticize Laura"-" do I." A. Neither B. Either C. So D. Too 24. I want some cake, but there was left. A. either B. some C. none D. both 25. Have you read A. any B. lot C. some 26. of these books? D. every of this money is yours, and half is mine. A. Any B. HalfC. Some D. Another all of my children have visited this pagoda. B. Most C. A great deal D. A wide variety of 27. A. Almost 28. She has given me A. others 29. You shouldn't expect three books. B. another C. the other D.other to do your work for you C. the other D. the others is a singer. C. the others D. the other A. others B. another 30. I have two brothers. One is a doctor, A. others 31. I'm not surprised he's feeling ill he was eating one ice cream after B. another C. others 32. She goes to English class every B. the other C. other English and French. C. or D. both A. the other B. another D. the others day. D. others A. another 33. He studied A. either B. neither 34. They have two children, A. both B. all C. most D. none 35. We had bought three pairs of shoes. of them are cheap. A. No B. None C. Neither D. Either of whom live abroad. 36. Park Hang Seo, who is the head coach of the Vietnam national football team, is a new idol of A. much B. a geat deal of 37. I'm thinking of traveling to either Argentina A. or B. nor C. and D.all 38. I have people. C. many D. both Brazil. things I want to talk to you about. A. a great deal of B. a large amount of C. a number of D. a great many of 39. She has spent A. a great deal 40. Nowadays, cyberbullying has been receiving of time in Europe. B. much C. the number D.each public attention. A. few B. much C. many D. plenty Exercise 2Choose the best answer to complete each sentence