X-2/3=9/(x-2)^2 3/1.4+3/4.7+....+3/(3x+1)(3x+4)=2/7 Giúp mình vs. Mình cần gấp hứa có 5s và trl hay nhất ạ

Khi cho V lít CO2 (đktc) vào dung dịch chứa 0,05 mol Ba(OH)2 thu được 4x gam kết tủa. Nếu cho 2V lít CO2 (đktc) vào dung dịch chứa 0,05 mol Ba(OH)2 thì thu được 2x gam kết tủa. Tính V và x? giúp mk với mk cần gấp

helppppp 1. What do you say when you want to know the way to the post office?- "................" 2. What do you say when you want to go out? - "........................................................" 3. What do you say when you want to know the price of a book? - ".........................." 4. What do you say when you want to know the time now? - "..................................." 5. What do you say when you want to know the weather today? - "............................"

lạy ông đi qua lạy bà đi lại vẽ cho con/đề bài: vẽ cái nịt.

V. Mark the letter A, B,C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions Question 1. Tom’s jokes are inappropriate but we have to put up with it just because he’s the boss. A. inappropriate B. It C. Because D. the Question 2. The Oxford Dictionary is well known for including many different meanings of words and to give real examples. A. The B. well known C. meanings D. to give Question 3. All the candidates for the scholarship will be equally treated regarding of their sex, age, or nationality. A. candidates B. Scholarship C. Regarding D. nationality Question 4. Weather and geographical conditions may determine the type of transportation using in a region. A. Weather B. Geographical C. the type of D. using in Question 5. Commercial airliners do not fly in the vicinity of volcanic eruptions because even a small amount of volcanic ash can damage its engines.

III. Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. Question 1. School uniform is compulsory in most of Vietnamese school. A. depended B. optional C. obligatory D. required Question 2. Names of people in the book were changed to preserve anonymity. A. cover B. conserve C. presume D. reveal Question 3. A large city such as Chicago would be called an urban area. A. metropolitan B. rustic C. suburban D. sophisticated Question 4. We arrived home safe and sound. A. healthy B. unsound C. insound D. dissound. Question 5. He revealed his intentions of leaving the company to the manager during the office dinner party. A. disclosed B. concealed C. misled D. influenced Question 6. Slang can be defined as a set of lexical, grammatical, and phonological regularities used in informal speech. A. informative B. official C. situational D. casual Question 7. Adverse weather conditions made it difficult to play the game. A. favorable B. bad C. comfortable D. severe Question 8. The Red Cross is an international humanitarian agency dedicated to reducing the sufferings of wounded soldiers, civilians and prisoners of war. A. happiness B. loss C. sadness D. pain and sorrow Question 9. They are launching a campaign to promote awareness of environmental issues. A. encourage B. publicize C. hinder D. strengthen Question 10. We have to employ extra staff to deal with the increased workload. A. approach B. dismiss C. interview D. meet

chứng minh 3 tính chất trong hình bình hành (a. Các cạnh đối nhau, b. Các góc đối bằng, c. Hai đường chéo cắt tại trung điểm của mỗi đường ). Chứng minh 5 đáu hiệu nhận biết hình bình hành

Mọi người giải giúp e câu 11 với ạ

cail chữ : đùa không vui :)) để đây ai nhột tự hiểu tone đỏ nâu - đỏ (digi ko nhận tradi)

II. Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. Question 1.The maintenance of these old castles must cost a lot of money. A. building B. foundation C. destruction D. preservation Question 2. People in the mountainous areas are still in the habit of destroying forests for cultivation. A. planting B. farming C. industry D. wood Question 3. Paris is the ideal place to learn French; it’s a beautiful and hospitable city with Institutions for high quality linguistic teaching. A. noticeable B. friendly C. affectionate D. natural Question 4. American children customarily go trick-or-treating on Halloween. A. inevitably B. happily C. traditionally D. readily Question 5. At times, I look at him and wonder what is going on his mind. A. Never B. Always C. Hardly D. Sometimes Question 6.We should join hands to protect our environment. A. take up B. put up C. work together D. make decisions Question 7. The fact that space exploration has increased dramatically in the past thirty years indicates that we are very eager to learn all we can about our solar system. A. seriously B. gradually C. significantly D. doubtfully Question 8. Everyone is hoping and praying that lasting peace will eventually come to the area. A. complete B. ongoing C. temporary D. enduring Question 9. Before you begin the exam paper, always read the instructions carefully. A. orders B. answers C. rules D. direction