Bài 42. Cho tam giác ABC vuông tại A có BD là phân giác, kẻ DE vuông góc với BC (E thuộc BC). Gọi F là giao điểm của AB và DE. Chứng minh rằng: a) BD là đường trung trực của AE b) DF = DC c) AD < DC c) AE // FC

x + 1/5=3/7 x - 3/4=1/2 -x - 9/2004=-1/2003 5/9-x=1/2004

1. Marry _________(go) shopping with her friends every weekend. 2. Lan and I __________(make) cakes for my mom in the kitchen right now. 3. Look! That boy__________(climb) the tree. He may ________(want) to catch the birds on the tree. 4. They __________(write) a lots of essays to their teacher yesterday. 5. At this time last month, she _______(travel) to New York, but now, she __________(stay) at home due to COVID pandemic. 6. Henry _________ never (be) to Vietnam before. She _______________(visit) Vietnam nextweek with her family. 7. The sky is dark. It ______________(rain). 8. Wow! How lovely that skirt is! I _________(buy) it tomorrow. 9. Be quiet! My children ___________(sleep) in the bedroom. 10. I hate him because he ____ always _________(throw) barbage on the street. 11. _____ you ______(know) how to make a plan? 12. My sister ________(study) in London for 4 years. She misses her family so much. She ________(come) back home next month. 13. When I ________(arrive) to the bus stop, my friend _________(stand) there with other students. 14. While my teacher ________(write) the lesson on the board, some of my friends ________(talk) with each other. 15. I bought a movie ticket. I ________(go) to the cinema tomorrow evening. 16. Her dad __________(teach) English since 2006. 17. The moon ________(move) around the earth. 18. I believe he _________ (join) the Math international competition. 19. This is the first time he ____________ (read) a famous novel. 20. My mom _______________(stop) working at the supermarket in 2001. copy qua word rồi in 08:24Đã xem

Giúp mik làm câu c) và bài 4 nhé. Thanks nhìu !🙂

Rewrite those setences into passive voice PEOPLE HAVE USED THE INTERNET ALL OVER THE WORLD

Giup mk nha ( đầy đủ chi tiết nhé - ko spam đâu nha ) Giải pt sau : $ x^2 = 2^x$

Word family: Can you read? (Using: - og, - in, - ed, - it, - un) 1. The p.... is in the th.... f.... 2. H.... the ball and s..... in the p... 3. The d..... and the frog are on the l.... 4. It is f..... in the s..... I can r..... 5. Ted is in the r..... b......

Rewrite those setences into passive voice PEOPLE HVE USED THE INTERNET ALL OVER THE WORLD

Cho tam giác ABC vuông tại A đường cao AH .Biết góc ABC bằng 60 độ .Tính AH

TÌM X a. 3x ²+6x=0 b. x ³-3x ²-4x+12=0 c. (x-1)(x+2)-x-2=0 d. (2x+5) ²+(4x+10)(3-x)=0 e. (3x-1)(2x+7)-(x+1)(6x-5)=16 g. (2x+3) ²-2(2x+3)(2x-5)+(2x-5) ²=x ²+6x+64 h. (x-2) ²-(x+1)(x-1)=0 i. 3x ² -5x-12=0 k. x ²-4=2(x+2) ² Mọi người giúp mk vs ạ