các bạn chỉ cần viết đáp số thôi nhé(tớ đang cần gấp) thank you Bài 7: Ba đội công nhân được giao đắp một con đường. Nếu đội thứ nhất làm một mình thì sau 15 ngày sẽ hoàn thành công việc. Nếu đội thứ ba làm một mình thì chậm hơn đội thứ nhất 5 ngày nhưng nhanh hơn đội thứ hai 2 ngày. Hỏi nếu cả ba đội cùng làm thì sau bao lâu sẽ hoàn thành công việc? Bài 8: Ba vòi cùng chảy vào một bể nước. Nếu chỉ mở vòi thứ nhất thì sau 12 giờ sẽ đầy bể. Nếu chỉ mở vòi thứ hai thì sau 15 giờ sẽ đầy bể. Nếu đồng thời mở cả ba vòi thì sau 4 giờ sẽ đầy bể. Hỏi nếu chỉ mở vòi thứ ba thì sau bao lâu sẽ đầy bể?

cho biểu thức 5x^2+3x-1. tính giá trị của biểu thức tại: x=0 x=-1 x=1/3

I. Read the passage and decide whether the sentences are true (T) or false (F). Visit the Edinburgh Festival Every year, thousands of people come to Edinburgh, the capital city of Scotland, to be part of the Edinburgh Festival. For three weeks every August and September the city is filled with actors and artists from all over the world. They come to Edinburgh for the biggest arts festival in Britain. During this time, the streets of the city are alive with music and dance from early in the morning until late at night. You can even see artists painting pictures on the streets! Ten thousands of tourists come to the Festival to see new films and plays and to hear music played by famous musicians. This year, you can see over five hundred performances with actors from more than forty countries. The tickets for these performances are quite cheap, and it is usually easier to see your favorite star in Edinburgh than it is in London. So come to Edinburgh next summer. 1. The Edinburgh Festival takes place once every four year. 2. Edinburgh is the capital of Scotland. 3. The Edinburgh Festival is a month long. 4. The Edinburgh Festival is in October. 5. Actors come to the Edinburgh Festival from lots of different countries. 6. Edinburgh Festival is the biggest festival in Great Britain. 7. It is expensive to go to the theatre in Edinburgh. 8. It is usually more difficult to see famous actors in London than Edinburgh

VI. Read the passage and fill a suitable word in each blank to complete its summary below. Nasreddin’s Visitors One day a visitor came to Nasreddin’s house. “I am your cousin from Konya,” he said, “and I have brought you a duck to celebrate the visit.” Nasreddin was delighted.He asked his wife to cook the duck, and served the visitor a fine dinner. The next day another visitor arrived. “I am the friend of the man who brought you the duck,” he said. Nasreddin invited him in and gave him a good meal. The next day another visitor arrived, and said he was the friend of the friend of the man who had brought the duck. Again Nasreddin invited him in for a meat. However, he was getting annoyed. Visitors seemed to be using his house as a restaurant. Then another visitor came, and said he was the friend of the friend of the friend of the man who had brought the duck. Nasreddin invited him to eat dinner with him. His wife brought some soup to the table and the visitor tasted it. “What kind of soup is this?'” asked the visitor. “It tastes just like warm water.” “Ah!” said Nasreddin, “That is the soup of the soup of the soup of the duck.” One day, Nasreddin had a ....................... (1) who claimed to be his ....................... (2) from Konya. The visitor brought a ....................... (3) as a gift, and Nasreddin’s ....................... (4) made some ....................... (5) with it, and served a fine meal. Then another visitor arrived, saying he was a ....................... (6) of the cousin;then a third, who said he was a friend of the friend of the cousin. They didn’t bring any ....................... (7), but Nasreddin gave them a meal anyway. However, when the ....................... (8)visitor arrived, Nasreddin became angry. Instead of soup, he served.................. (9) water. He told the friend of the friend of the friend of the cousin that it was soup of the soup of the soup of the .................... (10). (HELP ME!!!)

Dạ mọi người chỉ em câu này với ạ :(( em cảm ơn rất nhiều ạ

giai phuong trinh:a,x+1/35+x3/33=x+5/31+x+7/29

Giải Giúp Em bài tập này với ạ cảm ơn

một máy biến thế có hiệu điện thế cuộn sơ cấp là 220V, số vòng cuộn sơ cấp là 500 vòng, hiệu điện thế cuộn thứ cấp là 110v. hỏi số còng của cuộn thứ cấp là bao nhiêu vòng ?

Giải hộ câu 1 ý c :) 1 ý thôi mà không giải thì t cũng chịu=)))

Ai vẽ cho mik 1 trong những thành viện của nhóm Hero Team được ko. Ai vẽ được tất cả thì càng tốt. tô màu nữa thì càng tốt