một mảnh đất hình chữ nhật có chiều dài là 24 m và chiều rộng bằng 1/3 chiều dài'.. một mảnh đất hình vuông có cạnh bằng 1/2 chiều dài của hình chữ nhật Tính chu vi và diện tích hai hình trên

a, (8.x-16) . (x-5)=0 b, 255-(x+9)=(84.a) giúp e vs ak

3. Em hiểu như thế nào là nhà văn kiểu mới: nhà văn – chiến sĩ. Gấp mn oi

Cho tam giác mnp vuông tại m,mn=3cm ; mp=4cm, tia phân giác của góc n cắt mp tại a . Trên tia đối của tia an lấy điểm d sao cho na=ad , từ điểm d vẽ đường thẳng vuông góc với mp tại k và cắt np tại điểm e a) tính độ dài np b)chứng minh tam giác MAN=tam giác KAD c) chứng minh EN=DE d) chứng minh rằng MA<AP Giải hộ em với ạ em cảm ơn

Mọi người giúp em với ạ!!!! Em cảm ơn mọi người nhiều lắm ạ !!!

3. Theo em, tiếng trống trường ba hồi chín tiếng là dữ liệu hay thông tin? Hãy giải thích rõ?

(m+1)x^2-2(m-1)x+m-2=0 có 2 nghiệm âm phân biệt hay dương phân biệt

Giúp mình câu này với anh mình cảm ơn

Biết 400ml dung dịch HCl 1M đủ để hòa tan hết 13g kim loại A hóa trị 2 a) Tìm kim loại A b) Nếu cũng lấy 400ml dung dịch HCl 1M thì có thể hòa tan bao nhiêu g oxit kim loại A

21. A small fish needs camouflage to hide itself so that its enemies cannot find it. A. cover B. beautify C. show D. locate 22. Solar energy doesn't cause pollution, but it is not cheap. A. expensive B. effective C. commercial D. possible Read the following passage and mark the letter A, B, c, or D to indicate the correct word that best fits each of the numbered blanks. It is estimated that about three billion people use the Internet computer network around the world. Most people use the Internet to (23) _______information or for entertainment. A new study, however, shows US that almost 10% of Internet users are using it SO often that it is seriously harming their lives. The study (24) _______that these people may find it difficult to stop using the Internet because they have become addicted. Someone who is addicted finds it extremely difficult to stop (25) _______activity. According to a psychologist in the field. 30% of Internet users claim that they use the Internet to escape from (26) _______or emotions. The study also shows that having a chat or discussion with strangers on the Internet is one of the most (27) _______activities. 23. A. take B. get C. make D. catch 24.A. says B. speaks C. converses D. tells 25. A. the B. a C. an D. Ø 26. A. trouble B. nuisance C. dangers D. problems 27. A. liking B. desired C. addictive D. hunted Read the following passage and mark the letter A, B, c, or D to indicate the correct answer to each of the questions. One of the biggest trends in television in recent years has been the rise of “Reality TV”. These shows, in which ordinary people are placed in unusual situations and then filmed without a script, have become some of the highest rating shows on television. Early programs of this genre, including Big Brother (from the Netherlands) and Survivor (from the United States), have led to dozens of copycat programs in many different countries. A common element to many of these programs is that a number of contestants are placed in a closed environment in which they are filmed 24 hours a day, and every week contestants are thrown off the show. What is it about these shows that makes them so popular? Perhaps it is because viewers enjoy watching ordinary people with real emotions being placed in extraordinary, situations. Or perhaps it is that people are really voyeurs - they enjoy being a spy, looking secretly into other people’s lives. 28. In recent years, "Reality TV has become more and more_______. A. interesting B. unusual C. popular D. enjoyable 29. The underlined word ‘‘which” in the passage refers to_______. A. a common element B. a closed environment C. every week D. the show 30. We can see that Big Brother is_______. A. from the Netherlands B. from the United States C. a copycat program D. shown in many different countries 31. What is true about “Reality TV”? A. They are made by ordinary people. B. They create many copycat programs. C. They describe people’s lives. D. They are filmed without a script. 32. We can infer from the passage that_______. A. “Reality TV” used to be more trendy B. “Reality TV" is becoming more and more competitive C. viewers enjoy watching something real but unusual D. viewers can become spies to look into other people’s lives