Cho tam giác đều ABC có canh bằng a. Từ điểm M trong tam giác ve ME vuông góc với AB, MF vuông góc với AC, MP vuông góc với BC. Tính ME+MF+MP theo a

`|x-1| +|2-2x|+|3x-3| =10-x` Nêu cách làm nữa !

LM GIÚP MIK VS Ạ MIK ĐANG CẦN GẤP!!!! III. Choose the best answer A, B, C or D to complete the sentences. 1. Children drink milk every day. - It’s good for them. A. must B. ought C. don’t have to D. must not 2. I think Angela to buy that coat, it’s really lovely. A. must B. ought C. should D. have 3. We’ll go swimming today it’s hot. A. so B. because C. so that D. then 4. Let me your bag. A. carry B. to carry C. to carrying D. carrying 5. It’ll take me an hour to do the household . A. work B. chores C. job D. exercises 6. The Gong Festival is held in the Central Highlands. A. year B. which C. annual D. annually 7. does Hoa Ban Festival take place? - In Lai Chau. A. What B. Where C. When D. How 8. It is typical of the cultural life of Thai people. A. some B. a C. the D. Ø 9. do the cattle provide for the nomads? - Dairy products, meat, and clothing,, A. What B. Where C. Why D. How 10. During the festival, they fly many kites in different shapes and sizes. A. colour B. colourless C. colourful D. colouring 11. An old woman was the goats up the mountainside. A. riding B. taking C. herding D. running 12. is the festival celebrated? – Every year. A. When B. How often C. How D. What 13. We are looking for place to spend night. A. the-the B. a-the C. a-a D. the-a 14. Please turn off lights when you leave room. A. the-the B. a-a C. the-a D. a-the 15. We are looking for people with experience. A. the B. a C. an D. Ø

Với mọi số tự nhiên n chứng minh phân số sau đây là phân số tối giản A=2n+1 / 2n+3

uây za mấy vị huynh đệ của ta đâu hết rầu ra giúp ta bài này đi nào @@

III. Read the following passage, and answer the questions that follow Thomas Alva Edison was born in Ohio in 1847. As a child, he received less than a year of formal schooling, but was educated at home. His parents allowed him to set up a laboratory in their basement and his mother gave him books about chemistry and electronics. Edison credits his mother as being ‘the making’ of him. In 1878, Thomas Edison began serious research into developing a practical incandescent lamp and on October 14, 1878, Edison filed his first patent application for "Improvement In Electric Lights". In 1879 he created a successful incandescent light bulb. This was his hardest project – from 1877 to 1880, Edison and his assistants tried around 3000 experiments to perfect their light bulb design. By the end of 1880, Edison had produced a bulb that lasted 1500 hours. This discovery marked the beginning of commercially manufactured light bulbs and in 1880, Thomas Edison’s company, Edison Electric Light Company began marketing its new product. 21. When was Edison born? A. in 1878 B. in 1847 C. in 1877 D. in 1500 22. Where was Edison’s laboratory? A. at his school B. in a company C. in the city D. in their basement 23. How many hours did the 1880 bulb last? A. 3000 B. 1500 C. 1880 D. 1878 24. What does the word “its” in the last sentence refer to? A. Thomas Edison’s company B. Thomas Edison’s patent C. Thomas Edison’s invention D. Thomas Edison’s discovery 25. What is the main idea of the passage? A. A brief history of the light bulb B. The early life of Thomas Edison C. Family of Thomas Edison D. Thomas Edison’s company m ng giúp e ak

Giúp mình với, mình cần gấp lắm:

Làm ơn hãy giúp em huhuhuhuhuhuhhuhuhuhuhuhu

When we visit my aunt,they expect me....on my best best behaviour.(be) -> to be Giải thích vì sao dùng to be?

lm giúp mink vs ạ,mink cần gáp,hứa vote 5 *