cho 2x-m/x-2+x -1/x+2=3 tìm m để biểu thức có nghiệm dương

Năm lớp 7A,7B,7C,7D ủng hộ tết vì người nghèo. Số tiền ủng hộ của mỗi học sinh các lớp 7A,7B,7C,7D,7E lần lượt là: 25; 24; 20; 20 nghìn đồng. Tính xem trung bình mỗi học sinh khối 7 ủng hộ bao nhiêu tiền? Biết sĩ số các lớp 7A,7B,7C,7D lần lượt tỉ lệ với: 6; 5; 4; 3 MK ĐANG CẦN GẤP LÉM. GIÚP MK NHA!!!!!

Một nhà vườn hái được 45kg trong đó 4/5 số cam đã chín vàng. Tính số cam chín vàng là bai nhiêu kg

VIII. Put the correct form of the following verbs in the correct blanks to complete the letter. not get back take decide find hire dive do arrive get up not be stop go Dear Ha, Hi, I’m on holiday in Nha Trang with the Robinson. We ..................... (1) last Saturday. The first day the weather ..................... (2) very nice, so we ..................... (3) some sightseeing. I .................. (4) lots of photographs. On Monday, we .................. (5) a car and .................. (6) out into the country. We ..................... (7) for lunch at a lovely little village and then in the afternoon we ..................... (8) a beautiful beach. Last night ..................... (9) to the cinema. We ..................... (10) till about 11p.m, so we ..................... (11) late this morning and we ..................... (12) to have a relaxing day by the hotel swimming pool. So that’s where I am now. Love, An IX. Fill in the blank with a suitable word open forget come be bring have turn wait make Dear John, Come and see me next weekend. I’m staying in a house by the sea. Don’t (l) to bring your swimming costume with you! It isn’t difficult to find the house. When you get to the crossroads in the town, (2) right and drive to the end of the road. (3) careful because it is a dangerous road! (4) some warm clothes with you because it is cold in the evenings here. If I am not at home when you arrive, don’t (5) for me. The key to the house is under the big white stone in the garden. (6) the front door and (7) yourself a cup of tea in the kitchen! (8) a good journey! Best wishes, Vinh

Một người đi xe máy dự định đi từ Ađến B hết 3 giờ .Nếu người đó tăng tốc thêm 8 km/giờ thì đi từ A đến B chỉ mất 2 giờ 24 phút . Tính quãng đường AB

Giải giúp mình bài anh văn với mọi người ơi

tìm giá trị nhỏ nhất của biểu thức A= A^4-2a^3-4a+5 ai giúp em với

Bài 1 : Cho độ cao của một số địa điểm như sau : Tam Đảo : 2591 m, Biển chết : -292m. các câu sau đúng hay sai? a, Đỉnh núi Tam Đảo cao hơn mực nước biển là 2591m b, Biển chết có độ cao trung bình thấp hơn mực nước biển là : -392m.

Giúp mình với mọi người Exercise 8: Give the correct form of the verbs in brackets: used to + V or simple past. (1) 1. I (see) .................. Marcus at the library working hard. He told me to say hello to you. 2. She (be) ....................... a lot happier, but then she lost her job. 3. There (be) ....................... three restaurants in this town, but two closed down leaving only one. 4. If you look over there, you can see the field where they (fight) ....................... the Battle of Harris Hill in 1509. 5. Did you (take) ....................... a lot of photos when you were in Moscow last year? 6. How many hours a day did you (go) ....................... to school when you were ten? 7. Children never (talk) ....................... so aggressively to their parents. It’s terrible! 8. Soldiers (build) ....................... this bridge near the end of the Second World War. 9. Your mother (have) ............................... a Yorkshire Terrier when she was a young girl, didn’t she? 10. When I was five, I (be) ....................... able to do incredible gymnastics. Now I can’t even touch my toes. Exercise 9: Give the correct form of the verbs in brackets: used to + V or simple past. (2) 1. I (not play) ................................... computer games when I was a child, but now I (play) ................................... a lot of games in the evening. 2. Mike (not smoke) ................................... before going to the army. 3. There (be) ................................... three parks in our village, but now there (be) ................................... only one. 4. Murat (like) .................................. cheeseburgers, but now he (eat) .................................. healthy food. 5. She (not cook) ................................... before she got married, but now she (cook) ................................... everything. 6. Alex (not have) ............................. a mobile phone, but now he (send) .............................. text messages easily. 7. When I was single, I (have) ................................... big parties in my house, but now I (watch) ................................... TV in the evenings. 8. When I was in Vietnam, I (watch) ................................... football matches at the stadium. Now I (watch) ................................... on TV every weekend. 9. A: you (drink) ........................... a glass of milk every morning when you were a child? B: Yes, I did, but now I (drink) ................................... a cup of coffee every morning. 10. My sister (love) ............................... classical music, but she (hate) .............................. it when she was younger.

viết 1 bài văn nêu lên trách nhiệm của em và gia đình khi đất nước có đại dịch