Answer:
cm
Step-by-step explanation:
C = 
C = 
Neither. When graphing both lines they intersect but are not perpendicular.
Answer:
x = 18
Step-by-step explanation:
All triangle angles add up to 180 so:
x + 5x + 72 = 180
6x + 72 = 180
6x = 180 - 72
6x = 108
x = 18
(x -1)(x +4) = 0
x² +3x -4 = 0 . . . . . . probably the form you're looking for