Answer:
C) 73
Step-by-step explanation:
The angles that measure 146° and (-39 + x)° are considered to be supplementary angles. A supplementary angle is when two angles sum up to equal 180°. We can create an equation with what we know;
146 + (-39 + x) = 180
~Remove parenthesis
146 - 39 + x = 180
~Combine like terms
107 + x = 180
~Subtract 107 to both sides
x = 73
Best of Luck!
