cho $a^{3}$ +$b^{3}$ +6ab<8 và a,b>0 tìm min Q=$\frac{1}{a^2+b^2}$ +$\frac{3+a^2b^2}{ab}$

VII. Complete each sentence with an appropriate preposition. 1. He’s put a ‘……………… sale’ sign on his old car, but nobody has shown any interest yet. 2. You can’t buy that model yet, but it will be ……………… sale next month. 3. Of course he’s ……………… debt. He owes me a lot of money. 4. You can have it ……………… loan for a few days, but I’ll need it on Saturday. 5. We stopped selling them because they are no longer ……………… demand. 6. I always pay for my purchases ……………… cash. 7. We’re happy to accept cash, or you can pay ……………… cheque or ……………… credit card. 8. I’m afraid we don’t have any size 46 shoes ……………… stock at the moment. 9. I don’t approve ……………… your smoking. I wish you would give ……………… that habit. 10. He was accused ……………… having stolen a car.

cho tam giác abc cân tại a . tia phân giác của góc abc cắt ac tại d tia phân giác cảu góc acb cắt ab tại e chứng minh rằng a) tam giác abd= tam giác ace b) de song song bc c) be=ed=dc

Hai số có tổng là 37,75. Nếu gấp số thứ nhất lên 5 lần và số thứ hai lên 3 lần thì được tổng hai số là 154,25. Tìm hai số đó

Read the passage and decide whether the following statements are true (T) or false (F): A hobby is a regular activity that is done for enjoyment, typically during one’s leisure time. Hobbies can include collecting themed items and objects, engaging in creative and artistic pursuits, playing sports, or pursuing other amusements. A list of hobbies is lengthy and always changing as interests and fashions changes. By continually participating in a particular hobby, one can acquire substantial skill and knowledge in that area. Engagement in hobbies has increased since the late nineteenth century as workers have had more leisure times and advancing production and technology have provided more support for leisure activities. As some hobbies have become less popular, like stamp collecting, others have been created following technological advances, like video games. 31. A hobby is a regular activity that is done for money. ( T ) ( F ) 32. There are few hobbies. ( T ) ( F ) 33. One can acquire substantial skill and knowledge in a specific area by continually participating in a particular hobby. ( T ) ( F ) 34. Engagement in hobbies has increased until the late 19th century. ( T ) ( F ) 35. Stamp collecting has become less popular. ( T ) ( F )

Giúp e với ạ H

1.This house and these doors are going to …… for Christmas day by the Greens. A. painted B. be painted C. paint D. be paint 2.What time ? A.the train will leave B. Will the train have been leaving C. does the train leave D. is leaving the train 3.It is time you …… your homework done. A.has B. had C. have D. having 4.The dogs…… fed before they went to the party. A.has B. have been C. had been D. having been 5.The car was dirty. They…… it for weeks. A hasn't cleaned B. haven't cleaned C.hadn't been cleaned D. hadn't cleaned 6.When they got home last night. They found that someone……into the house. A had broken B. had been broken C. has broken D. has been broken

Cho hình thang ABCD(AB//CD). Gọi I, H, K lần lượt là trung điểm của AD, BD, BC. Chứng minh 3 điểm I, H, K thẳng hàng

I. Each of the following sentences has one mistake. Identify the mistakes. (5 points). 1. My father prefers watching films at home than going to the cinema . A B C D 2. I’d like some informations about the flights to Lon Don tomorrow, please. A B C D 3. In the first meeting, a headmaster briefly introduced me to the school’s teaching staff. A B C D 4. Don’t forget turning off the computer when you leave. A B C D 5. A fully grown male mountain lion may be eight long feet. A B C D

Cho các oxit sau: MgO; N2O; BaO; ZnO; FeO; Fe3O4; K2O; N2O5; CO2; Al2O3. a) Gọi tên các oxit trên. b) Oxit nào tác dụng được với dung dịch axit HCl? Viết phương trình hóa học các phản ứng xảy ra.