giúp mình với nhường cho chị gì đó đã có slot rồi nha

Có ai còn on ko ạ. Giúp mik câu này, khó quá. Bài 1: Cho ABC cân ở A, từ B kẻ đường thẳng vuông góc với AB, từ C kẻ đường thẳng vuông góc với AC, hai đường thang này cắt nhau tại D. a) Chứng minh BD = DC. b) Chứng minh AD là đường trung trực của BC. c) Gọi H là giao điểm của AD và BC. Tính AH biết BC = 6cm; AB = 5cm

ai làm hộ mình với ạ :(( mình nhiều bài quá :(( mình cảm ơn trướcccc : (x+4)^2+(3+x)(3-x)=1

tim gia tri nguyen cua x dr gia tri tuong ung cua b la 1 so nguyen:x^2-6x+9/x^2-9

CÂu 10 11 nên chọn đáp án nào vậy moj người

Hai hợp chất X và Y (MX < MY) đều gồm ba nguyên tố trong đó có nguyên tố Nhôm (Al). Cho X tác dụng với axit dư, sản phẩm tạo thành có hai chất tan trong đó có chứa Y. Cho Y tác dụng với kiềm dư, sản phẩm tạo thành có hai chất tan trong đó có X. Em hãy chọn một cặp chất X, Y phù hợp. Viết các phương trình phản ứng xảy ra? Giúp mình với ạ ☺☺☺

Tổng số tuổi của con và ba là 34 . Sau 3 năm tuổi ba gấp 4 lần tuổi con . Hỏi tuổi ba là bao nhiêu tuổi

Tìm a,b biết a+b=162 và ƯCLN(a,b)=18 giải thik chi tiết từng bước giải xong mik vote 5 sao cảm ơn nhiều ạ giúp mik với

Choose the phrase or clause A, B, C or D that best completes each sentence. 11. The attorney told his client that ___________________________. A. they had little chance of winning the case B. the case was of a small chance to win C. it was nearly impossible to win him the case D. the case had a minimum chance to be won by him 12. One of the professor’s greatest attributes is ____________________________. A. when he gives lectures B. how in the manner that he lectures C. the way to give lectures D. his ability to lecture 13. _____________________ received law degrees as today. A. Never so many women have B. Never have so many women C. The women aren’t ever D. Women who have never 14. The students liked that professor’s course because ________________________. A. there was few if any homework B. not a lot of homework C. of there wasn’t a great amount of homework D. there was little or no homework 15. Since he changed profession, Fred’s yearly income has ______________________. A. nearly tripled B. got almost three time bigger C. almost grown by three times D. just about gone up three times.

Choose the best way of making up the sentence from the words and phrases given. 6. education/ give/ knowledge/ things/ around/ and/ it/ preserve/ national/ noble traditions and customs/ generation. A. Education gives us knowledge of things around us and it preserves the national noble traditions and customs from generation to generation. B. Education gives us the knowledge of things around us and preserves national noble traditions and customs for generation and generation. C. Education has given us knowledge about the things around us and it preserves the national and noble traditions and customs for generation and generation. D. Education is giving us knowledge of things around us and it preserves the national and noble traditions and customs from generation to generation. 7. You/ ask/ things/ yourself/ especially/ reason/ you/ decide/ apply/ job. A. You may ask many things by yourself, and especially about the reason you decide to apply for a job. B. You may ask many things yourself, and especially the reason why you have decided to apply for the job. C. You may be asked many things about yourself, and especially the reason why you have decided to apply for the job. D. You may be asked many things about yourself, and especially about the reason why you decide to apply for the job. 8. some/ pesticides/ fertilizers/ we/ spray/ crops/ find/ dangerous. A. Some pesticides and fertilizers which we spray on our crops are found dangerous. B. Some of pesticides and fertilizers we spray to our crops are found to be dangerous. C. Some of the pesticides and fertilizers we are spraying with our crops have been found to be dangerous. D. Some of the pesticides and fertilizers we have sprayed on our crops have been found to be dangerous. 9. appearance/ steamboats/ railroads/ reduce/ transportation cost/ effects/ conditions/ workers. A. Appearance of the steamboats and the railroads have reduced transportation cost and had effects in conditions of workers. B. The appearance of steamboats and railroads reduced transportation cost and had effects on the condition of workers. C. The appearance of the steamboats and railroads have reduced transportation cost and had effects on conditions of workers. D. The appearance pf steamboats and railroads had reduced transportation cost and had effects on conditions of workers. 10. If/ there/ flying saucers/ be/ traces/ landing. A. If there were flying saucers, it would be traces of their landing. B. If there were flying saucers, there would be traces of their landing. C. If there were flying saucers, there will be traces of their landing. D. If there are flying saucers, there would be traces of their landing.