What equals (−1)+(−2) using the number line.

-3

Step-by-step explanation:

(-1)+(-2)=-3

-3

Step-by-step explanation:

2+1=3 and just add the negative sign in front of it.

oof

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°