Rewrite in standard form and use the form to find the vertex.
(1, 5)
(x - 1)^2 + 5
180-2(55)-x=0
180-110-x=0
70-x=0
-x=-70
x=70°
C) x+3
first one factors to (x+3)(x-3)
second factors to (x+3)(x-2)
First, you should solve both equations for the same variable. Since the first one is already solved for y, solve the second equation for y as well.
6y = 2x + 6 Divide both sides by 6
y =

x + 1
You can see that both lines have a slope of

.
Lines that have the same slope are
parallel lines.