47. complete the two column
proof.
given: m and are supplementary
prove: x =15
5x + 7x = 180
12x = 180
x=15
(3 points)

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

Choose the linear inequality that describes the graph. the gray area represents the shaded region. a: y ≤ –4x – 2 b: y > –4x – 2 c: y ≥ –4x – 2 d: y < 4x – 2

Which of these angles are supplementary? a. 100o and 90o b. 78o and 102o c. 54o and 146o d. 12o and 78o