Mọi người giải bài này giúp với

Một vật rơi tự do không vận tốc đầu tại nơi có gia tốc trọng trường . Trong giây cuối cùng rơi được quãng đường gấp đôi quãng đường đi được trong ngay trước đó. Tính độ cao lúc buông vật? giair giups em aj.

giúp mình 4 câu này với hứa vote đủ ạ !!

3/4x^3y^3:(-1/2x^2y^2) (-xy)^10:(-xy)^5

Các bạn ơi giúp mình với Mình cần gấp Hứa sẽ vote 5 sao và ctlhn nếu làm đủ 10 câu và nhanh nhất

Exercise 4:Correct the incorrect part of each sentence. (Gạch chân lỗi sai và sửa) 1. She wish she could speak English well.  2. If only it didn’t rained.  3. I wish I was a doctor to save people.  4. I wish I have more time to work.  5. He wishes it didn’t rain two days ago.  6. If only my father gives up smoking.  7. I wish I studied very well last year.  8. I wish you will come to my party next week.  9. I wish it stops raining now.  10. She wishes she is the most beautiful girl in the world. 

Hỗn hợp khí gồm CO, CO2, C2H4 và C2H2. Trình bày phương pháp dùng để tách từng khí ra khỏi hỗn hợp

Change these sentences into reported speech 1. Daisy said : “ Please lend me your history book, Joana. ” ……………………………………………………………………………………………… 2. The police said : “ Don’t touch anything in this room, everybody. ” ……………………………………………………………………………………………… 3. Mrs. Green said to her friend : “ Can you help my son with his literature ? ” ……………………………………………………………………………………………… 4. “ You shouldn’t translate each sentence into Vietnamese ”, his brother said. ……………………………………………………………………………………………… 5. “You should learn words and do exercises in order to get good grades”, my teacher said. ……………………………………………………………………………………………… 6. “ You have to take part in the rice-cooking contest tomorrow”, Nam’s father said. ………………………………………………………………………………………………… 7. “It was raining all day yesterday in Nha Trang”, my pen pal said. ………………………………………………………………………………………………… 8. “We are waiting for the school bus now”, the children said. ………………………………………………………………………………………………… 9. “Don’t touch this button or you will get a shock, Ha”, his father said. ……………………………………………………………………………………………… 10. “I must go to Hanoi today”, my friend said. …………………………………………………………………………………………………… 11. “The sun rises in the east and sets in the west”, my teacher said. …………………………………………………………………………………………………… 12. My friend said ,“ I have already written this letter”. ……………………………………………………………………………………………… 13. Carol said to me, “I will ask Mr. Wilson about this lesson the next day”. ……………………………………………………………………………………………… 14. Her friend said to her, “I don’t understand these lessons carefully”. ……………………………………………………………………………………………… 15. Mr. Quang said ,“I must leave right now”. ……………………………………………………………………………………………… 16. Charles said to Jane, “I have to leave the office before 3.30 pm” ……………………………………………………………………………………………… 17. Mary and John said, “We don’t know those two girls very well” ……………………………………………………………………………………………… 18. Jimmy said to Maryam, “I have given you this bike twice” ……………………………………………………………………………………………… 19. Mr. Pike said to me, “ I need you to help me with this work tonight.” ……………………………………………………………………………………………… 20. Helen asked the child, “Are you going to visit your uncle tomorrow ?” ………………………………………………………………………………………………

C. Yes – No Questions. 1. She asked him, “Have you read this book?” ……………………………… 2. “Did you know them, Tom?” she asked. ………………………………… 3. “Are there any letter for me?” Mary said to me. …………………… 4. I asked, “Do you want tea or coffee, Tom?” ……………………………… 5. “Do you know which cup you used?” she asked her son .………………… “ D.WH – Questions. 1. The policeman said, “What is the matter?”……………………… 2. My sister said, “Why are you so said?”…………… 3. She said to me, “Where have you put my shoes?”……………………… 4. He said to her, “Where are you going?”…………………………. 5. He said to me, “When will you come again?”……………………………

cho tam giác ABC vuông cân tại A. Giả sử D là điểm nằm bên trong tam giác sao cho tam giác ABD cân tại D và góc ADB 150 độ. Trên nửa mặt phẳng không chứa điểm D có bờ là đường thẳng AC lấy điểm E sao cho tam giác ACE đều. chứng minh 3 điểm B,D,E thẳng hàng.