Giúp mình với ạ Mình cần gấp Cảm ơn nhiều

Bài 1: a) {2x-3(x-1)-5[x-4(3-2x)+10]} * -2x Bài 2:Chứng tỏ rằng giá trị của mỗi biểu thức sau không phụ thuộc vào giá trị của biến a) 2(2x+x2) - x2(x+2) + (x3-4x+3) b) z(y-x) + y(z-x) + x(y-z) – zyz +100 c) 2y(y2+y+1)-2y2(y+1)-2(y+10)

Bài 4. Một máy bay bay với vận tốc 800 km/h từ Hà Nội đến Thành phố Hồ Chí Minh. Nếu đường bay Hà Nội – Hồ Chí Minh dài 1400 km thì máy bay phải bay trong bao nhiêu lâu? A. 1 giờ 20 phút B. 1 giờ 30 phút C. 1 giờ 45 phút D. 2 giờ

Mình đang cần gấp mình sẽ cho 5 sao

Giúp mk bài 6 với ạ.Mk đag cần gấp ạ!!!

Bài 10: Tìm giá trị lớn nhất hoặc giá trị nhỏ nhất của các biểu thức sau: a) A = 4x² – 12x + 10. b) B = 2x – x²– 2

disturb put like be hold have decide sleep stay cost 1. It was freezing outside, so I ___________ on my coat. 2. My mother was very busy yesterday, so I ___________ her. 3. Yesterday was Mary’s birthday but she ___________ a party. 4. We were exhausted, so we ___________ to leave the party early. 5. The bed was very uncomfortable. Tim ___________ well. 6. The musical wasn’t very good. I ___________ it much. 7. The restaurant wasn’t very expensive. It ___________ much to have dinner there. 8. I had to look after my little sister yesterday, so I ___________ time to call you. 9. It ___________ hard to lift the boxes. They weren’t very heavy. 10. It was raining heavily, so I ___________ in. 1. (+) I have finished my homework. (-) ________________________________________________________________. (?) ________________________________________________________________? 2. (+) ________________________________________________________________. (-) My uncle hasn’t been to Singapore before. (?) ________________________________________________________________? 3. (+) ________________________________________________________________. (-) ________________________________________________________________. (?) Have they found their keys? 4. (+) Jim has just played video games with his brother. (-) ________________________________________________________________. (?) ________________________________________________________________? 5. (+) ________________________________________________________________. (-) My grandmother hasn’t visited me since November. (?) ________________________________________________________________? 6. (+) ________________________________________________________________. (-) ________________________________________________________________. (?) Has your sister studied Medicine for 2 years? 7. (+) It has been long since our last encounter. (-) ________________________________________________________________. (?) ________________________________________________________________? 8. (+) ________________________________________________________________. (-) We haven’t graduated yet. (?) ________________________________________________________________?

Bài 1: Cho a, b, c là 3 cạnh của tam giác. CMR: 4a ²b ² > (a ² + b ² - c ²) ² làm đúng nhé :(( sai báo cáo :))

Moi nguoi lam on giup minh voi a

Vẽ anime/ chibi Yc: Full line, full màu, có tâm cackieu Digi/ tradi nhận tất :^