T=\(\sqrt{2x^2-2x+5}+\sqrt{2x^2-4x+4}>=13\)

ai giúp cho kick nè, love you, rất gấp

tìm min max căn x-2019+ căn 2020-x

cho hình bình hành abcd ,hai đường chéo cắt nhau tại o, vẽ đường tròn tâm o cắt các đường thẳng ab, bc, cd, da lần lượt tại m,n,p,q. hãy xác định dạng của tứ giác mnpq

Alice is playing with words. At each tick of her grandfather’s clock she swaps two letters. What is the smallest number of clock ticks during which she can change WORDS to SWORD?(A) 3 (B) 4 (C) 6 (D) 7 (E) 8

This pinwheel star is formed by rotating a right-angled triangle
around one of its corners. What is the angle at each of the nine
tips that are marked with dots?

(A) 30◦

(B) 40◦

(C) 45◦

(D) 50◦

(E) 60◦

I have twelve paint tins each capable of holding twelve litres. Half of them are half
full. A third of them are a third full. The rest are one-sixth full. How many litres of
paint do I have in total?
(A) 48 (B) 50 (C) 52 (D) 54 (E) 56

Tìm các số m, n nguyên dương thỏa mãn1/m+1/n=1/7

tìm max: căn(2-x)+căn(x+10)

dùng bđt cô si, bun hia em làm dc r. khổ thân em thằng lớp 7 phải làm bài l9

In the USA students (1) ___________ their secondary education at the age of 11. First they (2) ___________ to Middle School for three years. Then they go for High School for four years, from the age 14 to 18. Some students (3) ___________ school when they are 16 and (4) ___________ job. But most students (5) ___________ at High School still they are 18. Then they (6) ___________ exams and they get "High School Diploma". There aren't any national exams.

All students at secondary school in the USA (7) ___________ English, maths, science, and P.E., but students (8) ___________ other subjects, so they don't all study the same subjects.

About 90% of students in the USA go to (9) ___________ schools. About 10% go to (10) ___________ schools. Most of the private schools are religious schools.

16. I think the University of Cambridge is the second the United Kingdom.

A. oldest B. elder C. old D. older

17. The Temple of Literature ___ by old trees and __ many interesting things.

A. is surrounded – contains B. surrounds - is contained

C. surrounds – contains D. is surrounded - is contained

18. In 2003, four of Emperor Ly Thanh Tong, Emperor Ly Nhan Tong,

Emperor Le Thanh Tong and Chu Van An were built in the Temple of Literature.

A. statues B. forms C. stone tablets D. photos

19. We to Professor Marshall about the research topic two days ago.

A. have spoken B. were spoken C. spoke D. were speaking

20. Tan Ky House in Hoi An over two hundred years ago.

A. is to built B. was built C. build D. is built

21. The Temple of Literature in 1070.

A. find B. found C. was found D. was founded

22. The Temple of Literature______ by thousands of people every year.

A. is visit B. is visited C. was visited D. were visited

23. Emperor Ly Nhan Tong is the person who constructed_______

A. The Imperial Academy B. Great Wall

C. One-pillar Pagoda C. Ha Long Bay

24. Doctors’ stone tablets were made of______.

A. sand B. brick C. stone D. cement.

25. The Temple of Literature is one of the historic and_____ sites in Vietnam.

A. cultural B. culture C. old D. new

26. It’s a great idea to take some medicines______ you have a fever now.

A. so B. because C. but D. and

27. There is a pond_______ the garden and the house.

A. in B. among C. between D. on

28. Bach Ma National Park close to the sea.

A. locates B. located C. is located D. is being located

29. You’d better_____ an umbrella because it is going to rain.

A. to take B. taking C. take D. took

30. Oxford University the oldest university in the English speaking world.

A. is considered being B. is regarded

C. considered to be D. is regarded as

31. Many kinds of fruits and vegetables at the floating market in Can Tho.

A. sell B. are sold C. are selling D. will sell

32. Many precious relics in the Temple of Literature.

A. keep B. is kept C. kept D. are kept

33. In 2010, the 82 Doctors’ stone tablets as a Memory of the World.

A. recognised B. are recognised C. recognising D. were recognised

34. The first Doctors’ stone tablets in 1484.

A. were erected B. was erected C. are erected D. erected

35.The Temple of Literature by old trees and many interesting things

A. surrounds - contains B. is surrounded - is contained

C. is surrounded — contains D. surrounds - is contained

36. Thien Quang Tinh (Well of Heavenly Clarity) is________ in the third courtyard in the Temple of Literature.

considered B. visited C. put D. located

37. Hue Imperial City was________ as a world cultural heritage by UNESCO in 1993.

A. recognised B. developed C. rebuilt D. supported

38. Khue Van Pavilion is________ as one of the traditional symbols in Ha Noi.

A. erected B. entered C. regarded D. prepared

39. Those talented students were________ for this university from the entrance exams.

A. founded B. consisted C. selected D. booked

40. Many young men were ________for the dedication to the country in the Imperial Academy.

A. renamed B. educated C. ranked D. grown

41. Many famous scholars in Viet Nam's history were graduated _______the Imperial Academy.

A. in B. to C. at D. from

42. The old pagoda in this town was____ last month, but its architecture wasn't changed.

A. reconstructed B. worked C. surrounded D. situated

43. Chu Van An had a remarkable________ in teaching.

A. erection B. construction C. career D. preparation

44. I________ to sing first in the contest.

A. am chose B. am chosen C. were chosen D. choose

45. Hoan Kiem Lake_______ in Ha Noi. It is one of the most famous lakes in Viet Nam.

A. was situated B. were situated C. is situated D. are situated

46. Their organisation________ to support the preservation of historical places in this town last year.

A. is founded B. are founded C. was founded D. were founded

47. Her presents________ in her mother's trip in Ha Noi last week.

A. were bought B. are bought C. buy D. was bought

48. Some precious relics under Emperor Ly Thanh Tong________ in the Temple of Literature.

A. are displaying B. was displayed C. is displayed D. are displayed

49. Some old buildings________ in this town because the weather is so bad now.

A. weren't rebuilt B. aren't rebuilt C. were rebuilt D. are rebuilt

50. Her pictures of this trip ________ to her yesterday because her friend's computer was broken.

A. wasn't sent B. weren't sent C. didn't send D. aren't sent