Solve the system by substitution.
-7x + 5y = -27
y = 2x

(-9,-18)

Step-by-step explanation:

-7x +5(2x)=-27

-7x+10x=-27

3x=-27

=

x= -9

y=2(-9)

y=-18

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°

good luck on ur quiz test or homework. have a good day : )