What is the length of segment ab? a coordinate plane is shown. point a is located at 0, 12, and point b is located at 5, 0. the two points are connected by a line segment.
10 units
12 units
13 units
15 units

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°