Cho hình bình hành ABCD, từ B kẻ vuông góc BD cắt AC tại M, từ D kẻ vuông góc BD cắt AB tại N, I là giao AC và BD. Biết phương trình DM: x+y-4=0, P(-1/2;3) là trung điểm BI, E(5;0) thuộc NI. Tìm tọa độ A, B, C, D

you can't solve x because it is 2 linear equation and you only have one equation

large crystals result from very slow cooling.

evaporation of water: this would produce an evaporite which is a sedimentary rock. like a salt pan in a desert. not possible to have volcanic rocks originate this way.

crystalization in molten earth: slow cooling over time. (hundreds to millions of years)

crystalization at earth's surface: this results in fast cooling. (a few hours to a few months or years)

crystalization from cooling off hot water: that would be a hydrothermal deposit. while associated with volcanics they are not volcanic rocks themselves and usually occur fairly rapidly.

the equation is going to be

< 4 = < 5 they are vertical angles

120 degrees