Tìm 2 số tự nhiên biết tổng của chúng là 175 số nhỏ bằng 3/4 số lớn ( giải bài toán bằng cách lập hệ phương trình )

Cho tam giác ABC có Â nhọn. M là trung điểm của BC, trên tia đối của tia MA lấy điểm D sao cho MA = MD. a) Chứng minh: góc BAM=góc CDM b) Chứng minh : AC = BD; AC // BD c) Trên nửa mặt phẳng bờ AB không chứa C vẽ tia Ax vuông góc với AB. Trên nửa mặt phẳng bờ AC không chứa B vẽ tia Ay vuông góc AC. Trên tia Ax lấy điểm P sao cho AP = AB, Trên tia Ay lấy điểm Q sao cho AQ = AC. Chứng minh: tam giác ABQ= tam giác APC d) Gọi giao điểm của DA và PQ là K. Chứng minh : AK vuông góc với QP.

XI. Read the following passage, then choose the best answer among A, B, C or D to fill in the blank. (8 pts) For many young people sport is a popular (1) ____________ of school life and being one of the school teams and (2) ____________ in matches is very important. (3) ____________ someone is in a team it means a lot of extra practice and often spending a Saturday or Sunday away (4) ____________ home as many matches take place. When a school team (5) ____________ a match it is the whole school which feels proud and happy, (6) ____________ only the players. It can also means that a school is (7) ____________ for being good at certain sports and players from that school may later play in professional teams when they grow (8) ____________. 1. A. bit B. piece C. part D. number 2. A. working B. sporting C. doing D. playing 3. A. As B. If C. Then D. So 4. A. at B. on C. around D. from 5. A. wins B. is wining C. won D. was win 6. A. but B. though C. not D. and 7. A. fame B. famous C. well D. good 8. A. up B. on C. in D. out

Mọi người giúp mình bài 2 nhé . Mình đang cần gấp lắm

Có 12 que diêm, hãy xếp thành 5 hình tam giác. làm giúp em bài này vs mọi người ơi

giúp mình từ bài 225 đến hết nha, mình đang cần gấp , cảm ơn!!!!

4. Odd one out. small quiet noisy center Hãy chọn câu đúng

X. Complete the passage by filling in each blank with ONE suitable word. (10 pts) Thank you for calling the North London Arts Cinema. It (1) ___________ 7 days a week showing a variety of British and foreign films. Next week we still (2) ___________ an Italian film called “Midnight Meeting”. It is set in Milan in (3) ___________ 1950s. You can see (4) ___________ film from Monday to Thursday. It will be on twice a day in the evenings. That’s at 6.45 and 9.15. The film (5) ___________ two hours and fifteen minutes. Tickets are ₤4, but there is a special student ticket at ₤2.80 (6) ___________ all our midweek films. Please bring your student (7) ___________ if you want the cheaper ticket. The nearest car park (8) ___________ the cinema is in Victory Street. It’s just five-minute walk (9) ___________ the cinema. Thank you for calling the North London Arts Cinema. If you require further (10) ___________, phone during office hours – 9am to 4.30 pm, Monday to Friday.

cho x,y là các số thực dương thỏa mãn điều kiện x^2 + y^2 =1. Tìm giá trị nhỏ nhất của biểu thức K= x + 1/x + y + 1/y

VII. Fill in each blank with ONE suitable preposition. (5 pts) 1. I can’t understand these instructions. They are ___________ Chinese. 2. I spoke to her so much ___________ the phone last night. 3. I remember meeting her ___________ a party. 4. I think people should change their ideas ___________ life. 5. Would you love to make a big contribution ___________ your community? VIII. There is ONE mistake in each sentence. Underline and correct it. (5 pts) 1. Lan’s father prefers sports than other programs. _______________ 2. The teacher is standing at the middle of the room at the moment. _______________ 3. She is a keen student and she works very hardly. _______________ 4. He has a lot of friends. And he writes with them regularly. _______________ 5. We are going to have a two-weeks summer vacation in Da Lat next month. _______________