Mấy bạn ơi giúp mình vs🥰🥰 tạ ơn đầy đủ

Cho csc -2,x,6,y Tính P=x^2 +y^2

Cho hai gương phản vường góc với nhau, cho điểm sáng S đặte tước hai gương. Hãy vẽ hình minh họa cho số ảnh mà S tạo bởi hai gương

Giúp mik câu 9 vs ạ 5* và 1 cảm ơn nha

Từ metan và các chất vô cơ cần thiết, viết phương trình phản ứng điều chế polietilen và benzen

3.A. clothes B. fireworks C. scissors D. mountains 4.A. stadium B. place C. paddy D. lake 5.A. lunch B. music C. unpopular D. study II. Complete the sentences below using the correct form of comparative or superlative adjectives. Ex: - Lan is Hoa. (tall) Lan is taller than Hoa. - Nam is student in his class. (young) Nam is the youngest student in his class. 1. A new house is ……………………………… an old one. (expensive) 2. Motorbikes are ……………………………… bicycles. (fast) 3. My television is ……………………………… his television. (modern) 4. Summer is ……………………………… Spring. (hot) 5. Jane is ……………………………… her sister. (beautiful) 6. Skirts are ……………………………… dresses. (cheap) 7. Her English is ……………………………… my English. (good) 8. A bicycle is often ……………………………… a car in busy cities. (convenient) 9. Nile River is ……………………………… river in the world. (long) 10.This book is ……………………………… of these books. (interesting) 11. Ho Chi Minh City is ……………………………… city in Viet Nam. (big) 12.They are ……………………………… students in my class. (good) 13.These houses are ……………………………… in the village. (beautiful) 14.Winter is ……………………………… season in the year. (cold) 15.Airplane is ……………………………… means of transport. (fast) III. Give the correct form of the verbs in the simple future. 1. ……………………………… (they / come) tomorrow? 2. When ……………………………… (you / get) back? 3. If you lose your job, what……………………………… (you / do)? 4. They ……………………………… (do) it for you tomorrow. 5. My father ……………………………… (call) you in 5 minutes. 6. ……………………………… (she / get) the job, do you think? 7. We believe that she ……………………………… (recover) from her illness soon. 8. What ……………………………… (the weather / be) like tomorrow? 9. I promise I……………………………… (return) from school on time. 10. ( you / show )……………..me how to operate the new machine, please ? IV. Fill in the gap with should/ shouldn’t/ must/ mustn’t : 1.I don’t think you ………………………eat so much chocolate. It’s bad for your health. 2.I think waiters………………………………try to be pleasant with customers. 3.If you feel sick, you ……………………………… stay at home. It’s better for you. 4.I ……………………………… get my hair cut. I don’t like long hair. 5.We ………………………… go home. My mother has told me to arrive at ten o’clock. 6.I ……………………………… study hard. I want to pass the exam. 7.You ……………………………… accept things from strangers! 8.You ……………………………… steal things from shops. giúp mình với (hép miiiiiii)

Xác định công thức phân tử của các hợp chất sau: a. Hợp chất B có thành phần phần trăm của các nguyên tố là 39,32% Na ; 25,54%C ; 28,07 O và khối lượng mol của hợp chất là 142. b. Hợp chất A có khối lượng mol là 152 và phần trăm khối lượng của các nguyên tố là 36,84%Fe ; 21,05%S ; 42,11%O

Giúp mik câu 8 vs 5* và 1 cảm ơn nha

Làm cho minh 2 bài này với ạ mình sẽ vote 5 sao và đánh giá hay nhất cho ạ minh cảm ơn

NAME: …………………………………………………………………………………………………….… class 6A … Review 3 ( unit 7,8 ) Choose the word whose underlined part is pronounced differently from that of the others 1. A. though B. their C. thin D. them 2. A. flower B. poster C. local D. host 3. A. fair B. marry C. chair D. hair 4. A. reason B. feature C. idea D. teacher 5. A. bath B. healthy C. rather D. everything Odd one out 6. A. match B. stadium C. gym D. swimming pool 7. A. run B. play C. watch D. sport 8. A. better B. taller C. uglier D. smallest 9. A. game B. chess C. aerobics D. karate 10. A. broadcast B. producer C. report D. act Choose the best answer to fill in the blank. 11. I ________ Tom and Jerry many times. A. see B. am seeing C. have seen D. saw 12. ________ the film is late, I will wait to watch it. A. Although B. When C. But D. Because 13. Hoa ________ three goals for my team and he made it a hat trick. A. scored B. scores C. played D. got 14. ……………………. noise. Your brother is sleeping. A. Don’t make B. make C. making D. made 15. The mother told her son: “________swim in the lake. It's very dangerous." A. Do B. Don't C. can't D. Not swim 16. My sister likes going to the cinema ________ I like watching TV at home. A. or B. but C. and D. because 17. I first ________Ho Chi Minh City in 2013. A. been to B. visited C. go D. went 18. ……………………. do you play chess? – I never play chess A. How often B. When C. Why D. Who Choose the correct answers to complete the passage. Television is one of man’s most important (19)_____ of communication. It brings pictures and sounds from around the world into millions of homes. Through television, home viewers can see and learn (20)_____ people, places and things in faraway lands. TV even takes its viewers out of this world. It brings them coverage of America’s astronauts as the astronauts explore (21)_______ space. In addition to all these things, television brings its viewers a steady stream of programs that are (22)______ to entertain. In fact, TV provides many (23)_____ entertainment programs than any other kind. The programs include dramas, comedies, sports, and (24)______ pictures. 19. a. ways b. means c. ranges d. shows 20. a. at b. in c. for d. about 21. a. deep b. large c. outer d. open 22. a. happened b. designed c. composed d. guided 23. a. more b. even c. most d. hardly 24. a. lovely b. clear c. motion d. full