Idon't understand how to verify if expressions are equivalent algebraically, i can't find this anywhere in my pre-calculus notes.
if somebody could show me how to verify this expression, and explain their steps somewhat, so i can use it as an example, that would be a really big !

attachment?

step-by-step explanation:

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°

i’m sorry but i don’t know sorry

d is the only accurate one

step-by-step explanation: