ai giúp em trắc nhiệm vật lí với (lí 9)

a) (x-7) (x+12) 0 d) (2y -16) (8x-24) = 0 i) x.y = -5 b) (3x- 15)(6- 2x) = 0 e) (22-11y)(20- 4x) = 0 k) (x+4) (y- 5)=-3 P) (x-5) (x+2) c)(3x +9)( 4y-8) = 0 g)(7y + 14)( 9x-18) = 0 m) (x -9) (y-5) = -1 9) (4y-3) (5y+ 1) h)x.y =3 n) (x+3) (x+4) làm hộ mik với

1-2+3-4+5-6+... + 2009 - 2010 + 2011

cho 3 số nguyên tố a,b,c >3 thỏa man b=a+d , c=b+d chứng minh rằng d chia hết cho 6 d thuộc N

Bài 6: Chuyển các câu sau về thì quá khứ đơn: 11. They do not wait for anybody. ……….……….……….……….……….……….……….……….……….………. 12. Who teaches you English? ……….……….……….……….……….……….……….……….……….………. 13. The mansons build the house. ……….……….……….……….……….……….……….……….……….………. 14. They invite us to their party. ……….……….……….……….……….……….……….……….……….………. 15. His manners disgust me. ……….……….……….……….……….……….……….……….……….………. 16. She sings a lovely song. ……….……….……….……….……….……….……….……….……….………. 17. It is time to start. ……….……….……….……….……….……….……….……….……….………. 18. He wants to kill the snake. ……….……….……….……….……….……….……….……….……….………. 19. His conduct surprises me. ……….……….……….……….……….……….……….……….……….………. 20. I want you to come with me. ……….……….……….……….……….……….……….……….……….………. Bài 7: Trả lời các câu hỏi dưới đây dựa vào gợi ý trong ngoặc: 1. What did he win? (the race) ……….……….……….……….……….……….……….……….……….………. 2. What did he eat? (spaghetti) ……….……….……….……….……….……….……….……….……….………. 3. What time did the film finish? (at ten o’clock) ……….……….……….……….……….……….……….……….……….………. 4. How did he feel? (happy) ……….……….……….……….……….……….……….……….……….………. 5. What did he look at? (the stars) ……….……….……….……….……….……….……….……….……….………. 6. Where did they go? (to the cinema) ……….……….……….……….……….……….……….……….……….………. 7. What did he watch on TV? (cartoons) ……….……….……….……….……….……….……….……….……….………. 8. What time did he get up? (at seven) ……….……….……….……….……….……….……….……….……….………. 9. What did she play? (basketball) ……….……….……….……….……….……….……….……….……….………. 10. Where did she walk? (to school) ……….……….……….……….……….……….……….……….……….………. 11. Who did he see? (Maria) ……….……….……….……….……….……….……….……….……….………. 12. Where did he have breakfast? (in the garden) ……….……….……….……….……….……….……….……….……….………. 13. What did they want? (some chicken) ……….……….……….……….……….……….……….……….……….………. 14. When did they arrive? (in the morning) ……….……….……….……….……….……….……….……….……….……….

Cho tam giác ABC cân tại A. Kẻ ADI BC (D e BC) a) Chứng minh: A ADB = AADC b) Từ D kẻ DH 1 AB (HEAB) và DK 1AC (K e AC). Chứng minh: DH = DK

5-3x=6x+7 15-8x=9-5x

tình hình Âu Lạc từ thế kỉ II TCN đến TK I giúp em với

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Trắc nghiệm Nếu a+2>b+2. Khi đó: A.a<b B.2a+1>2b+1 C.-2a-1>-2b-1 D.3a+2<3b+2