chứng minh rằng : tứ giác ABCD có góc D=góc C,AD=BC thì ABCD là hình thang cân

để lát nền 1 căn phòng người ta đã dùng 180 viên gạch hình vuông có cạnh 50cm.hỏi căn phòng có diện tích bnhieu mét vuông, biết diện tích phần mạch vữa không đáng kể?

$x^{2}$ + 4x + 5 = 2$\sqrt[]{2x+3}$

Một khu đất hình chữ nhật có chu vi 150 m , chiều dài hơn chiều rộng 5 m . Hỏi diện tích khu đất đó là bao nhiêu đề - ca - mét vuông

mozart, who was born ( 1 ) ......... january 27 , 1756 in the austria city of salzburg , was neither the first (2) ....... the last child prodigy , but he was certainly (3) .... greatest . he was born into a morderately prosperous family where his unmatched musical genius made itself known extremely early. mozart began learning to play the harpsichord at three and his earliest known work (4)........ composed in 1761 (5)....... he was five , the age at which he also first appeared in public. from the age of six, (6) ....... father took him on the first foreign tour , mozart toured the courts and musical centres of austria , germany , france, england, holland, switzerland and italy. it has been calculated that mozart (7)...... almost a third of his short life ( he died at the age of 35) travelling. as mozart matured, he continued to tour (8)...... give concerts . mozart also wrote a lot (9)...... operas .his first opera, mitridate , re di ponto, was perform in milan when he was 14, and it was (10)....... of many successes in the life of the genius LÀM HỘ MK CÁI AK MK SẼ CHO ĐIỂM TUYỆT ĐỐI

Giúp mình vs mn ơi mình cần gấp

Đề bài 1là tính thành lũy thừa ak

Bạn nào giúp mình giải những câu này đi

Chuyển câu sang sang câu bị động They don’t allow dogs in the restaurant

Giải phương trình sin(2x-7)=2/3