2x+y=-2 x+y=5 x-coordinate of solution system

In triangle abc segment de is parallel to the side ac . (the endpoints of segment de lie on the sides ab and bc respectively). find de, if ac=20cm, ab=17cm, and bd=11.9cm;

Which polynomial function has x intercepts -1, 0, and 2 and passes through the point (1, -6)

Solve the given system of equations. 2y= -x+9 , 3x-6= -15