làm nhanh giúp mình 9h mình cần

Phân tích thành nhân tử 25x^2 -2

Một thửa ruộng hình thang có đáy bé 15m, ddaays lớn 20m. Người ta mở rộng đáy lớn thêm 5m thì diện tích tăng thêm 39m². Tính diện tích thửa ruộng ban đầu khi chưa mở rộng.

giúp mình với mọi người mình cần gấp

VIII/ Read the following passage and write the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbers blanks. There are many TV channels for children that offer interesting ….(42)….. for entertainment and learning. When …….(43).….. the programmes, children can visit far-away lands, ……(44)….. interesting people, learn about the world around them, laugh with the comedians and be entertained by the funny and colourful cartoons. Children can also participate …(45).……. a TV competition or become a guest at the studio of a programme. 42: A. channels B. programmes C. kinds D. schedules 43: A. watch B. watched C. watching D. to watch 44: A. read B. listen C. do D. meet 45: A. on B. in C. at D. of

Choose the letter A, B, C or D to indicate the word CLOSEST in meaning to the underlined word of the following question. How tall is that building? A. Big B. long C. high D. old 2 Choose the letter A, B, C or D to indicate the best answer to the following question. They ______________badminton next week. A. plays B. will play C. Playing D. to play 3 Choose the letter A, B, C or D to indicate the best answer to the following question. I have a lot of homework, _________ I can"t go out with you. A. but B. because C. so D. and 4 Choose the letter A, B, C or D to indicate the best answer to the following question. My brother and I will give last year’s clothes to ______ instead of throwing them away A. charity B. shop C. people D. survey 5 Read the text. Then, choose the letter A, B, C or D to indicate the best answer to the following questions. Technology will allow homes in the future to be “smart.” Appliances will communicate with each other - and with you. Your stove, for example, will tell you when your food is cooked and ready to eat. Refrigerators will suggest recipes based on food items you already have. Futurologists predict that many homes will have robots in the future. Robots already do many things such as building cars and vacuuming floors. But scientists today are starting to build friendlier, more intelligent robots that will be able to show feelings with their faces, just like humans. These robots will do work around the house such as cooking and cleaning. They will even take care of children and the elderly. How soon will this smart home be a reality? There’s a good chance it will be a part of your life in 25 or 30 years, perhaps sooner. Read the following passage and choose the letter A, B, C or D to indicate the best answer to the following question. What will make future houses smart? A. Humans B. Scientists C. Computers D. Technology

Thông thường, tai người có thể nghe đc âm có tần số bao nhiêu? Những tần số dưới 20 Hz là gì? Những âm có tần số lớn hơn 20000Hz gọi là gì ? Những động vật nào có thể nghe đc tần số thấp?

Dựa vào atlat địa lí Vn và kiến thức đã học,hãy trình bày sự phân hóa khí hậu và thủy văn của nước ta

Write a short paragraph (80-100 words) about the difference between urban and rural Suggest: Enviromet Education Traffic Whether you want to live in the coutryside or city,why

vết tập hợp sau : a) tập hợp A các số tự nhiên có 2 chữ số trong đó chữ số hàng chục lớn hơn chữ số hàng đơn vị là 3 b) tập hợp B các số tự nhiên có 3 chữ số mà tổng các chữ số bằng 5