Trong kho dự trữ của đoàn thám hiểm có số lương thực đủ cho 12 người sử dụng trong 10 ngày .Hỏi 15 người thì số lương thực đó đủ trong bao nhiêu ngày ?

Rút gọn biểu thức a, M=(m-n) ²+4mn b, B=(6z+2) ²+4*(3z-1)*(2+t)+(t+2) ² Ghi rõ từng bc làm

TASK 2: WRITING A NOTE You must leave your office for a few hours. Write a short note to your secretary to tell her where you are going to, what you want her to do, and when you will be back. Write at least 35 words. TASK 3: WRITING A POSTCARD You are spending your holiday in Da Nang city. Write a postcard to one of your friends. Write at least 40 words.

giúp mik lm 4 câu này với thanks

xét tính chẵn lẻ của hàm số y = x bình . sin x.

Read the following passage and write the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. Singapore is an Island City of about three million people.It is a beautiful city with lots of parks and open spaces. It is also a very (23)______city. Most of the people (24)______ in high- rise flats in different parts of the Island. The business district is very modern with (25)______ high new office buildings. Singapore also has some nice older sections. In Chinatown, there are rows of old shop houses. The Government buildings in Singapore are very beautiful and date from the colonial days. Singapore is famous (26)______its shops and restaurants. There are many good shopping centers. Most of the goods are (27)______. Singapore’s restaurants sell Chinese, Indian, Malay and European food, and the (28)______is quite acceptable. 23. A. polluted B. dirty C. smoggy D. clean 24. A. live B. living C. lives D. lived 25. A. lots B. a lot C. many D. much 26. A. at B. of C. for D. with 27. A. duty free B. free duty C. no duty D. none duty 28. A. money B. fee C. price D. currency

1.The cattle drank from a river_______ with toxic chemicals. A. pollute B. pollution C. pollutes D. polluted 2. The day-to-day _______of the company is left to a board of directors at the top. A. working B. establishing C. running D. all are correct 3. _______ , he was unharmed after being hit by lightning. A. Consequently B. Finally C. Cautiously D. Miraculously 4. I think its a bit ______to hope that we can beat them easily. They are much younger and better. A. reality B. really C. realised D. unreal 5. In many countries there are national companies belonging to the state, _______private companies. A. including B. as well C. together with D. but also 6. That honest man always speaks _______ is true even if it is bitter. A. that it B. that C. what D. which 7. The progress made in computer technology _______the early 1960s is remarkable. A. in B. for C. since D. during 8. Did you apologise to Mary, _______? A. who you spilt some coffee on her dress B. you spilt some coffee on her dress C. whose dress you spilt some coffee D. whose dress you spilt some coffee on 9. I _______ a better job, and I am going to accept it. A. was offering B. have been offered C. was going to be offered D. am offering 10. The necklace is interesting but not precious. A. invaluable B. very valuable C. worth a lot of money D. B and C are correct

Làm hộ mik mấy câu này với ạ, mik cảm ơnn

Calli: Ghen ăn tức ở NL: Ủa bị lm sao dị tròi, toàn ik bc dạo ko à. Gần chục tb mà chả bị xóa câu nào. Tui lm j có thù vs mấy bạn hã. Cái máy nó lag xong nó tự bc. Tuk. Hnay thấy toàn mấy ng ik bc dạo ko à.

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