5. Bỏ dấu ngoặc rồi tính: a) ( 3567 – 214) – 3567; b) ( - 2017) – ( 28 – 2017); c) -( 269 – 357 ) + ( 269 – 357 ); d) ( -123 + 345) + (456 + 123) – 2017 ( 345) − −  6. Tính giá trị của các biểu thức sau bằng cách hợp lí nhất: a) 136. ( - 47 ) + 36 .47 b) ( - 48 ). 72 + 36 . ( - 304 ) 7. Tính giá trị của biểu thức: a) A = 5a3b 4 với a = - 1, b = 1 b) B = 9a5b 2 với a = -1, b = 2 8. Tính giá trị của biểu thức: a) ax + ay + bx + by biết a + b = -2, x + y = 17 b) ax - ay + bx - by biết a + b = -7, x - y = -1 9. Tính một cách hợp lí giá trị của biểu thức a) A = (-8).25.(-2). 4. (-5).125 b) B = 19.25 + 9.95 + 19.30

Giúp em câu 6 với.cảm ơn nhiều ạ

. Read the passage, then choose the best answer for each question. CHRISTMAS Two popular traditions at Christmas are: decorating the home and singing the Christmas carols. The home is the center of the Christmas celebration. Inside, an evergreen tree is usually placed in the corner of the Living room. Children and their parents wrap string of colorful lights around the tree, they hang ornaments on the branches. A star or angle often crowns the top. Carefully wrapped gifts are placed beneath. Outside, families often string lights around the windows and wind light around trees and shrubs in the front yard. As the families decorate their homes, they often put on Christmas record. Almost every family has at least one favorite album or compact disc. School children of all ages perform Christmas concerts for their parents and communities. On Christmas’ Eve, family members gather around Christmas tree to sing traditional songs Such as Jingle bells and Silent night and then give presents to each other. 1. What are the popular traditions at Christmas? A. Decorating the home. B. Singing Christmas carols. C. Eating Christmas pudding. D A and B are correct. 2. Where is the evergreen put? A In the middle of the living room. C. In the middle of the bedroom. B. In the corner of the living room. D. In the corner of the bedroom. 3. How do they decorate the Christmas tree? A. They wrap string of colorful lights around the tree. B. They hang ornaments on branches C. They crown a star on the top. D. A,B and C are correct. 4. What do the family members often do on Christmas’ Eve? A. They gather around Christmas tree. B. They sing traditional songs. C. They gather around the tree, sing traditional song and get presents D. They give presents to each other. 5. What do they do as they decorate their home? A. They sing traditional songs. C. They eat Christmas pudding. B. They put on Christmas record. D. A, b and C are correct.

Giải giúp với ạ !!! Use the expressions to complete the following sentences, using the correct forms. a. robotics machine b. domestic researcher c. assembly machine d. killing attack e. tiny robot f. science-fiction scenario g. hackers’ line h. automated system 1. __________ have succeeded in making breakthroughs of A.I. development. 2. Some cruel scientists take advantage of biological technology combined with A.I. robots to create autonomous __________. 3. In many modern factories, robots are used in __________ , particularly in semiconductors and extremely small devices. 4. __________ eliminate the need for human interference in order to complete a task. 5. In many field of medicine, physicians can take control of __________ to deliver medicines and eliminate infected cells from patients’ bodies. 6. Hundreds of social networking users had their private information stolen after __________. 7. The great application of A.I. robots in the survey pointed out that people would rather use them as __________. 8. She expects to live in a __________ where robots help her do all her homework and replace her to go to

Choose the underlined word or phrase (A, B, C or D) that needs correcting. 1. I haven’t enjoyed myself so much since many months. A B C D 2. I wish I can go with you but I have to study for my exam. A B C D 3. Oranges are usually more expensive as apples. A B C D 4. I haven’t heard from Maria since a long time A B C D 5. She has a friend whom is the manager of this company. A B C D

Cho nửa đường tròn (O) đường kính AB. Kẻ tiếp tuyến Bx và lấy hai điểm C và D thuộc nửa đường tròn. Các tia AC và AD cắt Bx lần lượt ở E,F(F ở giữa B và E) a) chứng minh góc ABD = góc DFB b) chứng minh rằng tứ giác CEFD là tứ giác nội tiếp

Mn giải hộ em bài 1 với bài 3 ạ em cần gấp

tìm 5 số =1 ai nhanh nhất tớ sẽ vot cho 5*

3 dây dẫn thẳng song song dài vô hạn cùng nằm trong một mặt phẳng, hai dây liên tiếp cách nhau 6cm, I1=I2=I, I3=2A. Dây I3 nằm ngoài I1,I2 và I3 ngược chiều I1,I2. Tìm vị trí điểm M có B=0

Trừ mấy câu khoanh ra còn lại làm giúp mình nha. Xin lỗi mn nhiều vì điểm mình còn ít quá nhưng bài lại nhiều nên mình gửi ít điểm thôi nha. Mong mấy bn thông cảm.