Which of the following quadratic equations is written in descending order? −x^2+2x=0

x−x^2−2=0

x+2−5x^2=0

−2^22+3+x=0

look a the sides they are perpendicular

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°