Hằng ngày ,An đi học bằng xe đạp từ nhà đến trường hết 15 phút . Hôm nay , An được bố chở đi bằng xe máy trên con đường ấy với vận tốc nhanh hơn vận tốc xe đạp là 24 km/giờ nên An đến trường sớm hơn mọi ngày 10 phút . Quãng đường từ nhà An đến trường dài bao nhiêu km ?

cho số hữu tỉ x=a-5/a ( a ko bằng 0) . với giá trị nào của a thì x là số nguyên

Vẽ lại này nhe Cục màu hồng tự vẽ cấm ghép ảnh mạng

1/Cho 12,8 gam kim loại A hóa trị II phản ứng hoàn toàn với khí Cl2 thu muối B. Hòa tan B vào nước thu được 400ml dung dịch C. Nhúng thanh sắt nặng 11,2 gam vào dung dịch C, sau một thời gian thấy kim loại A bám vào thanh sắt và khối lượng thanh sắt là 12,0 gam, nồng độ FeCl2 trong dung dịch là 0,25M. Xác định kim loại A và nồng độ mol của kim loại B trong dung dịch C. Giải thích dùm mình A, B,C là gì luôn nhé , cảm ơn ạ .

Tìm TBC các số chẵn có 3 chữ số.

Tìm GTNN: 2x + $\frac{9}{x}$ (x > 0)

Câu hỏi trong ảnh nha 1 câu 60 đ đó

Giúp mk gấp với thanks ạ! Hứa Vote 5*

Mình cần gấp ạ mong các bn giúp Mik hứa sẽ vote 5 sao

Ai giỏi Tiếng Anh làm hộ bài này giúp mình với ạ :))) 1.Peter is studying English. He hopes either to write plays or to be an actor. He particularly enjoys plays about real people who led interesting lives. 2.Glenda is studying the history of music at college. She wants to listen to as much music from the past as possible, and particularly likes listening to people singing. 3.Wong is a dancer from China. He would like to see people performing dances from as many other parts of the world as possible to give him some new ideas. 4.Maria is celebrating her birthday tomorrow. She wants to go out for the whole day with her friends. They all enjoy listening to pop music. 5.Ruth is a teacher who is planning to start a drama club for the children at her school. She would like to see some children acting if possible. A. International Youth Celebrations Local youth groups, together with students from various countries including Spain, Finland, Austria and Estonia, are each performing three dance pieces. Then they will join together in a play about international friendship. The evening will finish with the singing of songs from different countries. B. River Festival A day of fun on the river bank, with a Chinese theme. Street entertainers and pop musicians perform during the day, followed by fireworks in the evening. Something for everybody to watch, both children and adults. C. Songs of Summer The Hunton Consort consists of eight voices singing music from hundreds of years ago right up to modern times. The group will perform songs, old and new, all of which are about the summer. D. Music in the Open Air Well-known nationally for their traditional dance music, Jimmy Locke and his band play throughout the day in the open air on the Promenade Bandstand — if the weather allows! E. Life Flows Between Us Kent Arts and Libraries present the first performance of a new dance group called the Street Dancing Company. The group will perform dances from the past on several of the bridges in the town F. A Star May Be Born Toni Arthur produces plays with seven- to eleven-year-olds, performed at the weekends for parents, family and friends. The plays come from children's stories, and encouragement from the audience is always very welcome. G. Vita and Harold The Image Theatre Company dramatises the love—letters of Vita Sackville-West and Harold Nicholson. The play is about the couple's lives and their most unusual marriage. Unsuitable for children. H. Variety Music Evening A great evening with the latest pop songs, and comedy and dancing from several great and unusual performers. Members of the audience will be invited to join in and will have the chance of winning tickets to a theatre show.