Nhờ mn giúp mik 2 bài này với ạ

Cho các đa thức A(x) = -1 + $5x^{6}$ - $6x^{2}$ - 5 - $9x^{6}$ + $4x^{4}$ - $3x^{2}$ B(x) = 2 - $5x^{2}$ + $3x^{4}$ - $4x^{2}$ + 3x + $x^{4}$ - $4x^{6}$ - 7x a) Thu gọn và sắp xếp các số hạng theo thứ tự giảm dần của biến b) Tìm bậc và các hệ số của mỗi đa thức

26.There is someone ______ the door. A. on B. at C. over D. in 27. This is a comfortable flat ______ us ______ live in. A. for - for B. from - to C. for - to D. with - to 28. Jennie smiled brightly ______ him, giving him butterflies in his stomach. A. at B. on C. over D. in 29. He has been absent ______ Monday. A. for B. since C. around D. on 30. She has made up her mind to stay ______ home ______ Christmas Day. A. at - on B. in - on C. at - at D. in - on 31. I was chatting ______ my colleague ______ lunchtime. A. with - in B. about - in C. with - at D. on - at 32. I had chicken salad and a glass ______ orange juice ______ dinner. A. of - in B. with - for C. of - for D. with - at 33. This town was very popular ______ tourists ______ the 1980s. A. with - on B. with - in C. with - on D. for - in 34. Write it ______ the paper, ______ the top of the page. A. on - at B. in - at C. on - in D. in - on 35. The train arrives ______ Chicago ______ ten o'clock. A. at - in B. near - at C. in - at D. from - to 36. There is a masterpiece hung ______ the wall ______ the window. A. in - above B. on - opposite C. on - between D. above - near 37. The bank is ______ the supermarket. A. next B. above C. opposite D. between 38.She likes to go ______ a picnic. A. for B. on C. in D. A and B 39. Everybody, let’s have a toast ______ his success. Cạn ly vì… A. in B. with C. to D. for 40. There was a loud noise which startled everyone ______ midnight. A. in B. through C. at D. for 41. I usually go to my parents' house ______ Christmas. We eat turkey together ______ Christmas Eve. A. at - in B. in - on C. at - on D. in - in 42. Firework display is a common ways of celebration ______ Lunar New Year’s Eve ______ Vietnam. A. on - in B. at - in C. on - at D. in -in 43. Take the next road ______ the left, then you will arrive ______ a pharmacy. A. in - at B. to - in C. in - at D. on - at 44. Telephone was invented ______ the 16th century. A. in B. on C. at D. for 45. There is a skyscraper ______ the city’s square and the amusement park. A. on B. between C. among D. from 46. It's better to travel ______ taxi if you are alone ______ night. A. by - at B. in - on C. in - at D. by - on 47. Nathan is a good friend ______ mine. A. for B. of C. in D. to 48. There is a new shopping center opening ______ the corner of this street. A. from B. at C. on D. in 49. ______ the most part, his explanations are quite easy to understand. A. For B. In C. Through D. By 50. ______ the ocean, corals are at risk from rising sea temperatures A. In B. From C. At D. On

Ai là người đầu tiên có công dựng quyền tự chủ ? A . Khúc Thừa Dụ B . Khúc Hạo C . Khúc Thừa Mĩ D . Dương Đình NGhệ

giúp mình câu 7 câu 13 câu14 câu 15

Choose the correct word in brackets to complete each sentence. 1. He doesn't have..............(much/many) money. 2. There are.........(fewer/less) students in this room than in the next 3. There is too...........(many/much) bad news on television tonight. 4. Would you like............(less/fewer) coffee than this? 5. Two years................(is/are) a long time to wait.. 6. What he told you.............(seem/seems) to be of importance. 7. Bread and butter...........(is/are) what she asks for. 8...........(A number of / The number of) students are going to the class picnic. 9.............(A number of/ The number of) days in a week is seven. 10. A............(few/little) people left early.

giải thích chi tiết có ngay hay nhất nhé

Mọi người uiii, giúp em với sắp đi học rùi mà vẫn chưa làm bài tập :(((. Em cảm ơn nhiều ạ

Vẽ ảnh dưới nhoa :33 Full line cho mềnh nha 😳

Một hình chũ nhật có diện tích 18/25 dam2,chiều rộng 7m2dm.hãy tính cạnh hình vuông có chu vi bằng chu vi của hình chữ nhật đó (theo đơn vị đo là là dm)