a)tìm n thuộc z để 2n là bội của n-1 b) n thuộc z để n+ 7 chia hết n-2

Các cậu làm giúp mình nhé cảm ơn a

Mọi người giúp em với em cần gấp

Supply the correct form of the verbs in the brackets: 1. Look! The plane is flying towards the airport. It (land) ……………….…… 2. Ha’s father (drive) ……………….……his car to the garage at the moment. 3. How your sister (go) ……………….……to school every day? - By motorbike, of course. 4. Mr. Tung is a teacher and he (not have).……………….……classes in the afternoon. 5. You mustn’t (eat) ……………….……food in this canteen. 6. The Nile River (flow) ……………….……to the Mediterranean Sea. 7. Mrs. Thuy is cleaning the windows and doors. Let’s (help) ……………….……her.

28. The living room is _____. A. old B. new C. large

dịch từ sang tiếng anh: - sắp xếp: - bắt mắt: - trang trại : - yên bình : - filter : - secret: - strange : - footage :

Đốt cháy hoàn toàn hỗn hợp M gồm hai rượu (ancol) X và Y là đồng đẳng kế tiếp của nhau, thu được 0,3 mol CO2 và 0,425 mol H2O. Mặt khác, cho 0,25 mol hỗn hợp M tác dụng với Na (dư), thu được chưa đến 0,15 mol H2 . Công thức phân tử của X, Y là

Giải giúp mik nha!!!! Cảm ơn các bn nhiều!!!!

Write the correct form of the words given in capital letters: 1. My school is the …………………..one in Thanh Oai District. (OLD) 2. All of us are are very good ………………….. (STUDY) 3. In our school library, there are four ………………….. (BOOKSHELF) 4. Hung visits his grandparents …………………..a week. (ONE) 5. My house is on the …………………..floor of that tall building. (NINE) 6. Nobody in my class is …………………..than Trang. (GOOD)

Mr. Thompson ........................................... (cook) dinner in the kitchen. Mrs. Thompson ........................................... (clean) their car in front of their house. Jack and Eve ........................................... (sit) in the hall near the fireplace. Jack, their 11 years old son, ........................................... (read) Shakespeare's sonnets. Eve, at the age of 16, ........................................... (play) with Barbies. Their grandma and grandpa ........................................... (have) a good time. Their grandma ........................................... (exercise) in the gym. Their grandpa ........................................... (iron) shirts and socks in the living room. They also had two pets. And do you know what they ........................................... (do)? Spot, the puppy, ........................................... (catch) mice in the garden. And Kitty, the little cute kitten, ........................................... (fight) with neighbour's dog. Giúp mị nha mn