cho hàm số y=(m+1) x -3m+1 a, tìm m để (d) song song với đường thẳng y =-x-2 b, tìm m để (d) cắt đt y=x-1 tại 1 điểm có tung độ bằng -1

bài 1 : a, y x 45 + y x 55 = 1000 b, ( y - 1/2 ) x 5/3 = 7/4 - 1/2 c, y - 6 : 2 - ( 48 -24 x 2 : 6 - 3 ) = 0 d, ( 7 x 13 + 8 x 13 ) : ( 9 $\dfrac{2}{3}$ - y ) = 39

Toán 8 , thu gọn mọi người giúp mình

REPORTED SPEECH EXERCISES 1. They said “We will finish the test tomorrow.” => They said…………………………………………………………………………… 2. She said “ I can swim well.” => She said…………………………………………………………………………….. 3. Mai said to her mother: “I want to go to bed early.” => Mai told…………………………………………………………………………….. 4. He said “ She must go now.” => He said……………………………………………………………………………… 5. My teacher said to us “ Your homework must be finished tomorrow.” => My teacher told us…………………………………………………………………. 6. They said “We will have an important meeting next week.” => They said…………………………………………………………………………… 7. “You can use my car today .” he said to me. => He told me………………………………………………………………………….. 8. He said “ I like traveling by air.” => He said……………………………………………………………………………… 9. She said “ I don’t like this table.” => She said…………………………………………………………………………….. 10. He said “ I will travel by taxi” => He said……………………………………………………………………………… 11. He said to me “ You can go out tonight with your brother.” => He told me………………………………………………………………………….. 12. She said “ He will visit Ha Noi Capital tomorrow morning.” => She said……………………………………………………………………………... 13. They said “ We don’t like eating this food.” => They said…………………………………………………………………………… 14. My mother said to me “You have to clean the window by yourself.” => My mother told me………………………………………………………………… 15. The teacher said to me “She always makes noise in this class.” => The teacher told me………………………………………………………………... 16. Minh said “ We can’t answer your question now, Nam.” => Minh told…………………………………………………………………………… 17. He said “My parents are proud of my command of English.” => He said……………………………………………………………………………… 18. They said “ We could swim across this river.” => They said…………………………………………………………………………… 19. They said “ We will try our best to success.” => They said…………………………………………………………………………… 20. She said “I hope you will be successful , Minh.” => She told…………………………………………………………………………… 21. He said to me “ Your room needs painting.” => He told me………………………………………………………………………… 22. She said “ They like drinking coffee every day .” => She said…………………………………………………………………………… 23. He said to me “ This test will be done again next month.” => He told me………………………………………………………………………….. 24. The teacher said “ I will give you good marks if you answer my question fluently , Mai.” => The teacher said…………………………………………………………………… 25. “ We enjoy swimming now.”she said. => She said……………………………………………………………………………. 26. They said “ Tung is the tallest boy in this class.” => They said…………………………………………………………………………… 27. “You must be on time tomorrow.” He said to me. => He told me…………………………………………………………………………. 28. She said “I work for that company.” => She said…………………………………………………………………………….. 29. “ Reading books helps you widen your knowledge ,” said she. => She said…………………………………………………………………………….. 30. “ I need these books ,” he said. => He said……………………………………………………………………………… GIÚP MK VS MK ĐANG CẦN GẤP LẮM Ạ

Mọi người lm ơn giúp em bài này vs ạ ! Em cần gấp lắm ạ ! Em cảm ơn! Tiện thể nếu có cấu trúc lưu ý thì mọi ng note lại giúp em vs

giup mik vs mik ko lam dc bai nay

Mọi người lm ơn giúp em bài này vs ạ ! Em cần gấp lắm ạ ! Em cảm ơn! Tiện thể nếu có cấu trúc lưu ý thì mọi ng note lại giúp em vs

∝ aminoaxit X chứa 1 nhóm -NH2 cho 10,3 gam X tác dụng vs HCl(dư) thu dc 13,95 gam muối khan. CTCT thu gọn của X là

Giúp mình mấy câu hỏi này với 1.When their dad came home, the kids _______ the Christmas tree. A. were decorating B. have decorated C. decorate D. are decorating 2.Thomas bought that pen at a low _______ at a local shop yesterday. A. fee B. salary C. fare D. price 3.You can find a lot of _______ information online for your project. A. usefulness B. usefully C. use D. useful 4. Binh has been trying to solve this problem all week, but he still hasn’t been able to _______ it. A. break B. shatter C. crack D. crash 5._______ the negative effects of plastic bags, they turned to paper bags instead. A. Have realised B. Having realized C. Have been realized D. Have been realising

Câu 2. Có 2 bình cách nhiệt: Bình A chứa 35L nước ở nhiệt độ 60oC, bình B chứa 7L nước ở nhiệt độ 20oC. Đầu tiên rót một lượng m nước từ bình A sang bình B. Sau khi bình B đạt cân bằng nhiệt, người ta lại rót trở lại từ bình B sang bình A một lượng m nước sao cho dung tích nước của 2 bình bằng lúc ban đầu. Nhiệt độ cân bằng lúc này trong bình A là 59oC. a. Tính lượng nước m trong mỗi lần rót và nhiệt độ cân bằng của bình B b. Tiếp tục thực hiện lần thứ 2, rót một lượng nước m từ bình A sang B đạt cân bằng nhiệt, rồi từ bình B sang bình A giống như trên. Tìm nhiệt độ cân bằng của mỗi bình. Câu 3.