Bài toán 26: Tìm x, y, z biết:

e) \(\frac{x}{3}=\frac{y}{4};\frac{y}{3}=\frac{z}{5}\) và 2x - 3y + z = 6.

g) \(\frac{2x}{3}=\frac{3y}{4}=\frac{4z}{5}\) và x + y + z = 49.

h) \(\frac{x-1}{2}=\frac{y-2}{3}=\frac{z-3}{4}\) và 2x + 3y - z = 50.

i) \(\frac{x}{2}=\frac{y}{3}=\frac{z}{5}\) và xyz = 810.

Giúp mình nha !!!

Bài toán 26: Tìm x, y, z biết:

a) \(\frac{x}{3}=\frac{y}{4};\frac{y}{5}=\frac{z}{7}\) và 2x + 3y - z = 186.

b) \(\frac{y+z+1}{x}=\frac{x+z+2}{y}=\frac{x+y-3}{z}=\frac{1}{x+y+z}\).

c) \(\frac{x}{10}=\frac{y}{6}=\frac{z}{21}\) và 5x + y - 2z = 28.

d) 3x=2y; 7y=5z và x - y + z = 32.

Bài toán 20: Tìm x, y, z biết \(\frac{x^3}{8}=\frac{y^3}{64}=\frac{z^3}{216}\) và x² + y² + z² \(=\) 14.

Bài toán 21: Tìm x, y biết:

a) \(\frac{x}{2}=\frac{y}{4}\) và x⁴ .y⁴ \(=\) 16.

b) \(\frac{y^2-x^2}{3}=\frac{x^2+y^2}{5}\) và x¹⁰ . y¹⁰ \(=\) 1024.

Giúp mình nha !!!

Bài toán 12: Tìm x, y, z biết: x: y: z \(=\) 3: 5: (-2) và 5x \(-\) y + 3z \(=\) 124.

Bài toán 14: Tìm a, b, c biết 2a \(=\) 3b; 5b \(=\) 7c và 3a \(-\) 7b + 5c \(=\) \(-\)30.

Bài toán 18: Tìm x, y, z biết: x: y: z \(=\) 3: 4: 5 và 2x² + 2y² \(-\) 3z²\(=\) \(-\)100.

Bài toán 10: Từ tỉ lệ thức \(\frac{a}{b}=\frac{c}{d}\left(a,b,c,d\ne o;a\ne\pm b;c\ne\pm d\right)\)Hãy suy ra các tỉ lệ thức

a) \(\frac{a+b}{b}=\frac{c+d}{d}\)

b) \(\frac{a-b}{b}=\frac{c-d}{d}\)

c) \(\frac{a-b}{a}=\frac{c-d}{c}\)

d) \(\frac{a}{a+b}=\frac{c}{c+d}\)

e) \(\frac{a}{a-b}=\frac{c}{c-d}\)

Giúp mình nha!!!

II. Wh – question:

11. When does he do the work?

12. How many days does she spend finishing the work?

13. How do you spend this amount of money?

14. What books are people reading this year?

15. How do the police find the lost man?

16. Who looks after the children for you?

17. How long have they waited for the doctor?

18. What time do the boys hand in their paper?

19. Why don’t they help him?

20. Who are they keeping in the kitchen?

Giúp với sắp nộp rùi >_<

I. Yes – No questions.

1. Do they teach English here?

2. Are you inviting her to your wedding party?

3. Does the teacher give some exercise?

4. Is she writing a poem?

5. Have they changed the window of the laboratory?

6. Is she making big cake for the party?

7. Has Tom finished the work?

8. Are the police making inquires about the thief?

9. Do we finish the test before ten?

10. Do buses bring the children home?

Giúp với, sắp nộp bài rùi >_<

Bài tập về câu bị động.

1. Somebody has taken my briefcase.

2. The teacher returns our written work to us.

3. She has just finished her report by soon.

4. The mad dog bites the little boy.

5. The police have arrested five suspects.

6. The doctor orders him to take a long rest.

7. The workers are building that tower.

8. A group of students have met their friends at the rail way station.

9. They don’t allow Tom to take these books home.

10. The teacher doesn't correct exercises.

11. They have operated Tom since 10 o’clock.

12. This is the second time they have written to us about this.

13. Mr. Smith has taught us French for two year.

14. They don’t look after the children properly.

15. Nobody has swept this street last week.

16. People drink a great deal of tea in England.

17. People speak English all over the world.

18. Tom is writing two poems.

19. She often takes her dog for a walk.

20. They make tea with cold water.

21. The chief engineer is instructing all the workers of the plan.

22. Somebody has taken some of my book away.

23. They hold the meeting before the May Day.

24. They have to repair the engine of the car.

25. The boys break the window and took away some pictures.

26. People spend a lot of money on advertising everyday.

27. They use this room for the classroom.

28. The teacher is telling a story.

29. Marry is cutting the cake with a sharp knife.

30. The children look at the women with a red hat.

31. She usually pulls my hat over my eyes.

32. For the past years, I have done all my washing by hand.

33. A pair of Robins has built a nest in the porch since last week.

34. The police haven’t found the murderer yet.

35. They seld one of her paintings at $1,000.

36. I put your gloves back in the drawer.

37. People speak English in almost every corner of the world.

38. You don't use the machine after 5.30 p.m.

39. Luckily for me, they don’t call my name.

40. After class, one of the students always erases the chalk board.

41. She cleans the wall before you paint it.

42. They tell the new pupil where to sit.

43. I knew that they have told him of the meeting.

44. Nobody has ever treated me with such kindness.

45. No one believes this story.

46. A sudden increase in water pressure may break the dam.

47. We take good care of books borrowed from the library.

48. A man I know has told me about it.

49. She drops the dish while she is washing it.

50. They use milk for making butter and cheese.

51. They are washing their car.

52. We have just met Jim.

53. They visit that church every two years.

54. Mrs. Green is cooking the food in the kitchen.

55. The doctor is examining the patients.

56. These boys make that noise.

57. He does these exercises quickly.

58. She doesn't lock the car.

59. Nobody tells them about the change of the meeting.

60. They usually pay the bill before the first of the month.

Giúp với, sắp phải nộp bài rùi >_<

Đề bài: Cho đoạn văn sau đây, theo em về phương diện nội dung và hình thức thì các câu liên kết như thế nào?

a) Tác phẩm nghệ thuật nào cũng xây dựng bằng những vật liệu mượn ở thực tại. Nhưng nghệ sĩ không những ghi lại cái đã có rồi mà còn muốn nói một điều gì mới mẻ. Anh gửi vào tác phẩm một lá thư, một lời nhắn nhủ. Anh muốn nghe một phần của mình góp vào đời sống chung quanh.

b) Ở rừng mùa này thường như thế. Mưa. Như mưa đá. Lúc đầu tôi không biết. Nhưng rồi có tiếng lanh canh gõ trên nóc hang. Có cái gì vô cùng sắc, xé không khí ra từng mảnh vụn. Gió. Và tôi thấy đau, ướt ở má.

Cô cho bài khó thật! Giúp mình với nha, tối đi học rồi, đang cần gấp >_<