có ai không?giúp tui với!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Làm giúp mik bài 3b vss (chỉ cần làm mỗi bài 3b thôi nhé)

Giúp mình bài `1:` ................

giúp mk nha. cảm ơn mọi người nhiều!

Mọi chuyện ơi giúp mình mới ạ:))) Mình cảm ơn

. Cho ba điểm A, B, C bất kì. Hãy vẽ các đường trung trực của các đoạn thẳng AB, BC, CA. Giúp mik với.

Cho $(y - z)^{2}$ + $(z - x)^{2}$ + $(x - y)^{2}$ = $(y + z - 2x)^{2}$ + $(z + x - 2y)^{2}$ + $(y + x - 2z)^{2}$ CMR : x = y = z

21. I play the piano quite well, though I have no particular ______ for it. A. talent B. judge C. performer D. process 22. This band proved to be inspirational, but sales never reflected their musical _________. A. public B. phenomenon C. achievements D. contests 23. “Baby One More Time” was truly a ________ when it first came out in 1998. A. demanding B. phenomenon C. patriotic D. contestant 24. A ________ says that one of the best ways to win a contest is to forget that she is there and play for the audience. A. idol B. contest C. judge D. talent 25. You can _______ your favorite theme song by leaving us a comment. A. nominate B. release C. eliminate D. passionate

Cho tam giác ABC vuông tại A, đường cao AH, biết AB=3cm, CH=16/5. Tính AC

13. The show involves a ________ of five stages: the first begins with the blind auditions, followed by the battle rounds, the knockouts, the live playoffs and finally, the live performance shows. A. contest B. work C. achievement D. process 14. Battle is a game between two teams or ________ who have equal scores to decide the winner. A. contestants B. performances C. platinums D. recordings 15. A lot of artists ___________ from depression due to stressful working schedule. A. post B. adore C. release D. suffer 16. The ___________ of the “Four Seasons” concertos has been remade to celebrate the conductor's 80th birthday. A. recording B. composer C. audience D. nomination 17. Do not purchase concert tickets at the ___________. They are way more expensive, and the line of people waiting is too long. A. national prize B. composer C. audience D. box office 18. I think we should put as much ___________ on building a good plot for the music video as we do on creating stunning visuals. A. biography B. emphasis C. demanding D. boring 19. She sang beautifully. At the end of her ___________, she got a big round of applause from the audience A. platinum B. melody C. biography D. performance 20. The meeting will be hosted by Matthew Sharp who has performed _______ as singer, solo cellist and actor. A. worldwide B. prominent C. renowned D. inspirational