Please help me simplify this expression
7-9÷9+4(4-3)-7

3

Step-by-step explanation:

7-1+4-7=3

Remember PEMDAS

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°

if you was gonna solve for a, a is a   < -12