Solve the system of equations.
– 3y +51 = 26
– 2y - 51 = -16

-2

Step-by-step explanation:

add both equations up

-5y = 10 ➡ y = -2

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°