An equilateral triangle has sides of length (3x-y) cm, (x+5) cm and (y+3)cm. find the length of each side, can someone plz explain this?

y do u put "subscirbe to ence" on a app for ppl who need with their work?

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°

step-by-step explanation: