rút gọn biểu thức (x+3)^2-(x-4)(x+8)=1

Các từ usually, seldon, rarely, always, often, sometimes là những tù chỉ: Giúp với em dốt toán văn anh ạ

Giúp mình nhanh nhất có thể với ạ , mình đánh giá 5 sao

Read the text and then choose the best answer A, B, C or D. Yesterday, on the way home from school, I saw an accident. A boy was run over by a taxi when he was riding his bicycle. The boy's leg was broken and it was bleeding badly. Someone there tried to stop the bleeding. They put pressure on it and held it tight. A man used his mobile phone to call the emergency service. Some minutes later, an ambulance arrived and sent the boy to the hospital. Two policemen came to the scene immediately. Some people told the police that the taxi driver was driving at a very high speed when the accident happened. Some others began talking about the traffic accidents these days and blamed the increasing number of accidents on the roads for careless driving and drunk drivers. Question 31. What did the writer see yesterday? A. A fire B. An accident C. A crash. D. A fighting. Question 32. The accident happened between a taxi and _________. A. a car B. motorbike C. a bus D. a bicycle Question 33. The boy was sent to the hospital by _________. A. an ambulance B. a passenger C. a police D. a car Question 34. What part of his body was hurt? – His _________. A. head B. arm C. shoulder D. leg Question 35. How was the driver driving when the accident happened? – Very ________. A. well B. fast C. carefully D. slowly

Vì sao khi nghe thấy chanh ta lại cmar thấy chua Giải thích theo pxcđk nhé

Giúp mk với Đag kiểm tra r Cảm ơn trc ạ

Cho tam giác ABC vuông tại A=21 cm góc C =30° đường phân giác BD a) tính các cạnh và góc của tam giác ABC b) tính DC,DA và diện tích tam giác ABC

Choose the letter A, B, C or D to complete the sentences Question 16. He thinks elephants are………..animals. A. fascinates B. fascinating C. fascinate D. fascinated Question 17. Hurry up or we can't _________ the last bus home. A. go B. follow C. catch D. keep Question 18. I saw your parents _______ a car yesterday evening. A. in B. by C. at D. on Question 19. We didn't find it funny………..it was a comedy. A. despite B. in spite of C. although D. but Question 20. Do you ……………. anything about music festival called Burning Man? A. have B. understand C. know D. like Question 21. If people _________ the rules, there are no more accidents. A. follow B. remember C. obey D. take care of Question 22. Let's go to the Victor Cinema. I'm sure you'll find the film………… A. excite B. exciting C. excited D. excites Question 23. Anne and Joe _____ by sea tomorrow A. will travel B. travelled C. travel D. travels Question 24. La Tomatina is ………..in Spain, in a small town. A. holds B. hold C. held D. holding Question 25. ……………. often is Burning Festival held? - It's held every year. A. What B. How C. When D. Which Question 26. La Tomatina is a seasonal ……….. to celebrate the tomato harvest. A. celebration B. festival C. parade D. game Question 27. _______ can be an excellent source of free, renewable energy for poor farmers. A. Biogas B. Turbine C. Bulb D. Solar panel Question 28. …………. he spent much money on the film, it wasn't a big success. 3/4 - Mã đề 959 A. Despite B. But C. Although D. Even Question 29. We will travel from Spain to France by plane. The plane will ______ at 10 am and will land at 11:00 am in Paris. A. journey B. flight C. depart D. take off Question 30. It must be amazing ……… elephants racing. A. see B. seeing C. saw D. to see

mọi người giúp mình câu này ạ(không cần giải ra)đang cần gấp ạ.

Cho đường tròn (O; R). Một đường thẳng d cắt đường tròn (O) tại hai điểm C và D. Từ một điểm I thuộc đường thẳng d, ở ngoài đường tròn (O) sao cho ID > IC, kẻ hai tiếp tuyến IA và IB tới đường tròn (O). Gọi H là trung điểm của CD. a) Chứng minh năm điểm A, H, O, B, I cùng thuộc một đường tròn. b) Giả sử AI = AO, khi đó tứ giác AOBI là hình gì? Tính diện tích hình tròn ngoại tiếp tứ giác AOBI? c) Chứng minh rằng khi I di chuyển trên đường thẳng d thỏa mãn: Ở ngoài (O) và ID > IC thì AB luôn đi qua một điểm cố định. giúp vs ạ