Tìm giá trị nhỏ nhất của biểu thức a, A = | 2x - 6 | + 2 b, B = | x- 1| + | x - 2 | + | x - 3| + | x-4 |

Một người đi ô tô từ A đến B với vận tốc 35 km/h. Lúc từ B về A người đó đi với vận tốc 42 km/h. Do đó thời gian về ít hơn thời gian đi là 30' . Tính quãng đường AB???

Cách bấm tìm tính chẵn, lẻ của máy tính 570ES PLUS ạ( cho mk xin các bước).C ơn

Mỗi câu sau chứa một lỗi sai. Tìm và sửa chúng. 1. At present, I’m work as a teacher in a secondary school and I plan to work here for 2 or 3 years before going to Australia to study. ____________________________________________________________ 2. Fire are one of the most important inventions in history. ____________________________________________________________ 3. Beyonce was now a very well-known all over the world and she has released several albums in her singing career. ____________________________________________________________ 4. In the future, I came back to Indonesia to work after having a long vacation in Japan. ____________________________________________________________ 5. They haven’t seen each other since a long time. ____________________________________________________________ 6. The person I love the most is my elder brother, who are a very brave person. ____________________________________________________________ 7. Mr. Hung teaching us the subject “Applied Linguistics” when we were freshmen in the university. ____________________________________________________________ 8. George Clooney, a famous actor, achieved many prizes in his acting career so far. ____________________________________________________________ 9. It was a cloudy day in November, 2013 and I am having to take the last exam of my student life. ____________________________________________________________ 10. Smart phone helped us a lot in our daily life. ____________________________________________________________

1. I _____ at home last weekend. (stay) 2. Angela ______ to the cinema last night. (go) 3. I and my friends ______ a great time in Nha Trang last year. (have) 4. My vacation in Hue last summer ______ wonderful. (be) 5. Last June I _____ Ngoc Son Temple in Ha Noi. (visit) 6. My parents ____ very tired after the trip. (be) 7. I _______ a lot of gifts for my little sister. (buy) 8. Lan and Mai _______ sharks, dolphins and turtles at Tri Nguyen aquarium. (see) 9. Trung _____ chicken and rice for dinner. (eat) 10. They ____ about their holiday in Hoi An. (talk)

Viết lại câu sao cho nghĩa không đổi. 1. This last time she came back to her hometown was 4 years ago. => She hasn't............................................................................................................ 2. He started working as a bank clerk 3 months ago. => He has................................................................................................................. 3. It has been 5 years since we first flew to Singapore. => We have................................................................................................................ 4. I last had my hair cut in November. => I haven't................................................................................................................ 5. The last time we called each other was 5 months ago. => We haven't............................................................................................................. 6. It is a long time since we last met. => We haven't............................................................................................................. 7. When did you have it? => How long...........................................................................................................? 8. This is the first time I had such a delicious meal. => I have never................................................................................................................ 9. I haven't seen him for 8 days. => The last................................................................................................................ 10. To day is Saturday. I haven't taken a bath since Wednesday. => It is........................................................................................................................

1. He (be)…………. at his computer for seven hours. 2. She (not/have) ……………any fun a long time. 3. My father (not/ play)……….. any sport since last year. 4. I’d better have a shower. I (not/have)………. one since Thursday. 5. I don’t live with my family now and we (not/see)…………. each other for five years. 6. I…… just (realize)…………... that there are only four weeks to the end of term. 7. She (finish) ... reading two books this week. 8. How long…….. (you/know)………. each other? 9. ……….(You/ take)………… many photographs? 10. He (eat)………………. at the King Power Hotel yet? 11. They (live) ………….here all their life.. 12. How many bottles………… the milkman (leave) ………….? He (leave) ……….. six. 13. I (buy)…………. a new carpet. Come and look at it. 14. She (write)………….. three books about her wild life. 15. We (finish) ……………………one English course.

1. He (not read)………………………..magazine at present. 2. I (look) ...........................for Christine. Do you know where she is? 3. It (get) ........................ dark. Shall I turn on the light? 4. They (stay).................................in Manchester with their friends. 5. They (build)……………………….a new supermarket in the center of the town. 6. Have you got an umbrella? It (start) ........................... to rain. 7. You (make)…………..................... a lot of noise. Can you be quieter? I am trying to concentrate. 8. Why are all those people here? What (happen).........................? 9. Please don’t make so much noise. I (try) ..................... to work. 10. Let’s go out now. It (not rain)................... any more. 11. You can turn off the radio. I (not listen) ............. to it. 12. Kate phoned me last night. She is on holiday in France. She (have) ...................... a great time and doesn’t want to come back. 13. I want to lose weight, so this week I (not eat) ................ lunch. 14. Andrew has just started evening classes. He (learn) ................. German. 15. Paul and Sally have an argument. They (speak) .................. to each other.

Có 3 nhà sản xuất góp vốn làm ăn theo tỉ lệ 3,5,7. Hỏi mỗi người đóng góp bao nhiêu , biết rằng số vốn cần đóng góp là 105 triệu . Các bạn giải nhanh giúp mình nhé

Khoanh tròn đáp án đúng cho mỗi câu sau. 1. Andrew has just started evening classes. He ................. German. A. are learning B. is learning C. am learning D. learning 2. The workers ................................a new house right now. A. are building B. am building C. is building D. build 3. Tom ............................. two poems at the moment? A. are writing B. are writeing C.is writeing D. is writing 4. The chief engineer .................................... all the workers of the plant now. A. is instructing B. are instructing C. instructs D. instruct 5. He .......................... his pictures at the moment. A. isn’t paint B. isn’t painting C. aren’t painting D. don’t painting 6. We ...............................the herbs in the garden at present. A. don’t plant B. doesn’t plant C. isn’t planting D. aren’t planting 7. They ........................ the artificial flowers of silk now? A. are.......... makeing B. are......... making C. is........... making D. is ........... making 8. Your father ...............................your motorbike at the moment. A. is repairing B. are repairing C. don’t repair D. doesn’t repair 9. Look! The man ......................... the children to the cinema. A. is takeing B. are taking C. is taking D. are takeing 10. Listen! The teacher.......................a new lesson to us. A. is explaining B. are explaining C. explain D. explains 11. They ………… …….. tomorrow. A. are coming B. is coming C. coming D. comes