xenobladegrace1 xenobladegrace1 01-11-2018 Mathematics contestada solve using substitution y=-7x^2-9x+6 y= 1/2x+11 y=-x^2+x-5 y=x-5 y=3x^2-2x-1 y=x-1 y=2x^2-3x-1 y=x-3