Rút gọn các phân số sau : a, 2^15 . 3^6 . 7/9^3 . 8^5 . 21 b, 100^2/2^4 c, 45^10 . 5^2/75^15

you (net/do) your prgect yet I suppose how long you (know) eachother you (take) manny photo graphs you ever (be) in new Jork?

cần gấp, ai làm chi tiết và đúng sẽ được tlhn

15120x(2/1x2x3 +3/1x2x3x4+...+6/1x2x3x...x7)=?

Fill in each blank with one of the conjunctions "and/ or/ but/ so/ because/ although" to complete the sentences. 1. Is her child a boy ___________________a girl? 2. I forgot to bring the map, ___________________I got lost. 3. He failed the examination ___________________he didn't study hard. 4. Lien won the match ___________________she was injured. 5. My new classmate is quite friendly ___________________sociable. 6. I don't like watching films on TV ___________________I like watching them at the cinema. 7. She likes watching cartoons ___________________they are colorful and funny. 8. He helps his friends a lot ___________________he is very busy. 9. Lan sings very well ___________________she cannot sing in front of many people. 10. The movie was very boring ___________________we went out to go shopping

tổng của hai số là 12,98. Nếu số thứ nhất gấp lên 2 lần và số thứ hai gấp lên 5 lần thì tổng của hai số là 54,46. Tìm hai số đó

nung 1 mẩu thép có khối lượng 10 g trong khí O2. Khí CO2 sinh ra được dẫn vào dd Ca(OH)2. phản ứng xong thu được 0,7g kết tủa. tính hàm lượng phần trăm của Cacbon trong thép đó.

giải chi tiết câu 24 với các bn

viết đoạn văn về đất nước mà em yêu thích bằng tiếng anh

1. He usually ......very hard, but he....at, all today because it's holiday (work, not work) 2. Look! That man .........out of the bank! and he....a large bag full of money!(run, carry) 3. I don't mind babysitting for you. Your baby never...(cry) 4. Every time he....a photo, his hand...., and his photos never........good(take, shake, look) 5. " Can you come out for a drink with us later ?" "Sorry I.....Lisa with her work, and it'll take us hours to finish it." (help) 6. She usually ....a BMW but today she......her husband's Volvo (drive, drive) 7. "Where do you live?" "Normally I......in Paris with my parents, but all the moment, I.....in London, so I.....with an English family"( live, study, live) 8. I....you...because you.....out of the window(know, not listen, look) 9. Julia.....five languages fluently, and at the moment she ....as a translator( speak, work) 10. I.....three pullovers in winter because I always....cold(wear, feel)