D would be the correct answer. Since angle W and angle Z form a straight line, they are supplementary angles. Supplementary angle add up to make 180°, which is what D states.
A doesn't make sense.
If B was true, then the angles would be complementary (adding up to 90°). They form a straight line, though, so it's incorrect.
C is wrong for reasons aforementioned.
6hx using the commutative property.
A=-4 , b=0 , c=4 so it will be f(-4)=0
f(0)=0 f(4)=0
<h2> the answer isthe value of x=20°</h2>