aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Giải giúp mình bài này với ,mình cần gấp lắm .Pls!!

1. 7x^2 - 7xy - 4x + 4y 2. 25 - m^2 - 2mn - n^2 3. a^2 + 2ab - ac + b^2 - bc 4. p^2 - 2pq - 9 +q^2 5. -16x^2 + 8xy - y^2 + 49 6. 36a^2 - ( a^2 + 9 )^2 7. 10ax - 5ay +y - 2x

2 vòi nước cùng chảy vào 1 bể thì sau 4 giờ 48 phút thì đầy bể. Nếu vòi 1 chảy trong 4 giờ, vòi 2 chảy trong 3 giờ thì cả 2 vòi chảy được 3/4 bể. tính thời gian để mỗi vòi chảy một mình đầy bể

Vẽ chibi_anime Biệt danh Bơ với cà chua có ai sd chx ak

giải dùm mình nhen gấppppppppppppppp

I. Chia động từ trong ngoặc thời quá khứ đơn: 1. The sea food (be)............ very delicious. 2. Hoa (get)............ a letter from her pen pal Tim yesterday. 3. I (go)............. to the movie last week. 4. They didn’t (buy)............. that house. 5. Liz (travel)............. to Ha Noi from Nha Trang two days ago. 6. She (make)............. a blue dress on her birthday. 7. Mr. Robinson (buy)............. Liz a cap 8. He (take)............. his children to the zoo last Sunday 9. The homework ............... very difficult yesterday 10. The children ............... in the park 5 minutes ago.

giúp em bài này với ạ,sắp nộp rùi! cám ơn trước ạ!

Calli : "Travel Vocabulary" (digi,full màu calli , đổ bóng các kiểu :)) NL : Hành trình học từ vựng lại bắt đầu =='

Mark letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to the original sentence in each of the following questions. 1. Study hard or you will fail the exam. A. You don’t fail the exam unless you study har B. If you don’t study hard, you will fail the exam. C. You don’t study hard, so you will fail the exam. D. Because you study hard, you don’t fail the exam. 2. My school has no playground equipment or extra activities. A. I wish my school had had playground equipment or extra activities. B. I wish my school had playground equipment or extra activities. C. I wish my school can have playground equipment or extra activities. D. I wish my school will have playground equipment or extra activities. 3. Children are allowed to have a voice in decision making in the family. We are pleased about that. A. We are pleased about children are allowed to have a voice in decision making in the family. B. We are pleased that children are allowed to have a voice in decision making in the family. C. We are pleased that children allowed to have a voice in decision making in the family. D. We are pleased for children to be allowed to have a voice in decision making in the family. 4. Although his leg was broken, he managed to get out of the car. A. In spite his broken leg, he managed to get out of the car. B. In spite of his broken leg, he managed to get out of the car. C. In spite his leg broken, he managed to get out of the car. D. In spite of his leg was broken, he managed to get out of the car. 5. They reported that the troops were coming. A. It had been reported that the troops were coming. B. It was being reported that the troops were coming. C. It was reported that the troops to be coming. D. It was reported that the troops were coming. 6. “What time did you come home last night, Mark?” said Tom. A. Tom asked Mark what time had he come home the previous night. B. Tom asked Mark what time he had come home last night. C. Tom asked Mark what time he came home last night. D. Tom asked Mark what time he had come home the previous night. 7. Did you always eat sweets when you were small? A. Were you use to eat sweets when you were small? B. Did you used to eat sweets when you were small? C. Were you used to eat sweets when you were small? D. Did you use to eat sweets when you were small? 8. We last visited Ho Chi Minh city 3 years ago. A. We didn’t visit Ho Chi Minh city for 3 years. B. We haven’t visited Ho Chi Minh city for 3 years C. We haven’t visited Ho Chi Minh city for 3 years ago. D. We didn’t visit Ho Chi Minh city for 3 years ago.