Một cái cọc cao 40m được đóng trên một triền dốc thẳng nghiêng với chiều ngang một góc 17o. Người ta nối một dây cáp từ đỉnh cọc đến cuối dốc. Tìm chiều dài của dây cáp cho biết đoạn đường từ đáy cọc đến cuối dốc bằng 72m.

Dạ bài này viết câu bị động nha

Bài 3: Theo kế hoạch, một tổ công nhân phải sản xuất 360 sản phẩm. Đến khi làm việc, do phải điều 3 công nhân đi làm việc khác nên mỗi công nhân còn lại phải làm nhiều hơn dự định 4 sản phẩm. Hỏi lúc đầu tổ có bao nhiêu công nhân? Biết rằng năng suất lao động của mỗi công nhân là như nhau. Bài 4: Theo kế hoạch, một phân xưởng phải may 3000 cái áo. Khi thực hiện, mỗi ngày phân xưởng may nhiều hơn so với kế hoạch 6 cái áo nên đã may đưoc 2650 cái áo trước khi hết hạn 5 ngày. Tính số áo phân xưởng phải may mỗi ngày theo kế hoạch. Bài 5: Một xưởng mỹ nghệ dự định sản xuất thủ công một lô hàng gồm 300 cái giỏ tre. Trước khi tiến hành, xưởng được bổ sung thêm 5 công nhân, nên số giỏ tre phải làm của mỗi người giảm 3 cái so với dự định. Hỏi lúc dự định, xưởng có bao nhiêu công nhân? Biết năng suất của mỗi người là như nhau. Giúp mình 3 câu này nha. Cảm ơn mn!!

Giải giúp em bài này với ạ em đang cần gấp lắm giúp em nhé

2a+b+c+d/a=a+2b+c+d/b=a+b+2c+d/c=a+b+c+ 2d/d TínhQ=a+b/c+d + b+c/d+a + c+d/a+d + d+a/b+c

Một vật chuyển động theo quy luật s=-1/3t^3 + 6t^2 là khoảng thời gian tính từ khi vật bắt đầu chuyển động và s là quãng đường vật di chuyển được trong khoảng thời gian đó. Hỏi trong 9s, kể từ khi bắt đầu chuyển động, vận tốc lớn nhất của vật đạt được là?

X. Read the text carefully, and then do the tasks that follow 1. Britain has always been a mixed society. In the distant past, Celts, Romans, Saxons, Vikings, and Normans all settled in Britain. During the past 150 years, people from Ireland, the former British colonies and the European Union have also come to Britain. 2. In the 1840s, there was a terrible famine in Ireland. A million people died and a million more left Ireland, and never returned. Most went to the USA, but many came to Britain. 3. In the 1950s and 1960s, the British government invited people from Britain’s former colonies to live and work in Britain. The majority was from the West Indies, Pakistan, India and Hong Kong. 4. People from countries in the European Union are free to travel, live and work in any other EU country. Recently, a lot of people have arrived from Central and Eastern Europe. 5. There are thousands of Indian and Chinese restaurants in the UK. Immigrants from the West Indies started the Notting Hill Carnival in 1965. It is now the biggest street festival in Europe. There are a lot of Irish pubs in Britain and Irish folk music is popular. Task 1: Match the headings (A-E) with the paragraphs (1-5) of the text ……. A. The European Union ……. B. Ireland ……. C. Introduction ……. D. The former colonies ……. E. How have immigrants influenced British life? Task 2: Match the highlighted words in the text with their meanings ……… 6. settled A. countries which another country controls ……… 7. colonies B. most ……… 8. famine C. came and lived ……… 9. majority D. not long ago ……… 10. recently E. a time when there is very little food ……… 11. immigrants F. people who come and live in another country Task 3: Are the sentences True or False? 12. Immigration into Britain started in the 19th century. 13. People left Ireland in the 1840s because there wasn’t enough food to eat. 14. Many Irish people left Ireland and returned later. 15. The West Indies, India, and Pakistan are former British colonies. 16. In the 1950s and 1960s, the British government tried to stop immigration. 17. In the last few years, a lot of people have arrived from southern Europe. XI. Use the words given and other words, complete the second sentence so that it has a similar meaning to the first sentence. Do not change the word given (Use 2-5 words in total) 1. We’ve never been to Alaska before. (ever) It’s the first time we ………………………………….. Alaska. 2. Tom plans to open to another restaurant in Manchester next month. (is) Tom ………………………………….. in Manchester next month. 3. The last time Phong visited Tasmania was five years ago. (visited) Phong ………………………………….. five years. 4. The early train is scheduled to arrive in London at 10 o’clock. (arrives) The early train ………………………………….. at 10 o’clock. 5. It’s the most beautiful waterfall I’ve ever seen. (such) I ………………………………….. beautiful waterfall. làm hộ mình.

VI. Choose the best answer to complete each of the following sentences 1. The Statue of Liberty is a major monument in New York which …………… freedom. A. attracts B. symbolizes C. decides D. understands 2. Like the kangaroo and koala, the platypus is a …………… animal in Australia. A. scenic B. tailless C. foreign D. unique 3. David uses English as his mother …………… because he comes from the UK. A. tongue B. mouth C. nose D. cheek 4. The Sydney Opera House is an …………… of Australia’s creative and technical achievement. A. orchestra B. emblem C. icon D. armorial 5. The government of New Zealand has done a lot to …………… the culture of the Maori. A. preserve B. surround C. puzzle D. pronounce 6. Coming to Scotland, visitors can drive through vast green …………… . A. lochs B. stations C. castles D. pastures 7. - How is your holiday in New Zealand? - …………… . A. Really B. Awesome C. Absolutely right D. Sure 8. The flight number 781 to Melbourne …………… at 9 o’clock tomorrow morning. A. arrives B. is arriving C. has arrived D. will arrive 9. Some documents say that people …………… the Glastonbury Festival since the beginning of the 19th century. A. celebrated B. were celebrating C. have celebrated D. celebrate 10. We …………… on the Great Ocean Road, an Australia National Heritage at the moment. A. will drive B. drive C. have driven D. are driving VII. Choose the word or phrase the is CLOSEST in meaning to the underlined part in each of the following sentences 1. This city is legendary for many significant events which many people around the world enjoy. A. well-known B. exciting of C. haunting of D. historic about 2. Driving through vast green pastures, or boating on scenic lakes – or lochs – are other attractions that Scotland offers. A. famous people B. beautiful places C. friendly tourists D. wide lakes and rivers 3. Australia is the world’s only country which covers an entire continent. A. large B. historic C. spectacular D. complete VIII. Choose the word or phrase the is OPPOSITE in meaning to the underlined part in each of the following sentences 1. When you get inside the spacious café, you will find yourself among various wooden puzzles and games. A. large B. haunted C. symbolic D. small 2. The truth about these castles, which are haunted by ghosts, is still puzzling, so many people still make questions about them. A. interested B. clear C. confusing D. questioning IX. Fill in each blank in the following passage with ONE suitable word English is the (1) ………………… language of the Philippines. English-medium education (2)………………… in the Philippines in 1901 after the arrival of some 540 US teachers. English was also chosen for newspaper and magazines, the media, and literary writing. The latest results from a recent survey suggest that about 65 percent of the (3) ………………… of the Philippines has the (4) ………………… to understand spoken and (5) ………………… English, with 48 percent stating that they can write standard English. The economy is based on English, and successful workers and managers are fluent (6) ………………… English. (7) …………………, many schools know that their (8) ………………… must be fluent in English to be successful. Làm hết hộ mình

cách đổi 12 kg khí C4H10 ra lít?

có bao nhiêu có có 4 chữ số abcd mà a,b,c,d đôi một khác nhau