Answer:
They are supplementary
Step-by-step explanation:
Since AB and DC are parallel, then the alternate interior angles are congruent because there is transversal cutting the parallel lines (BC). So m<B is supplementary to m<C
negative
-4
4x - 4 = 4x + ?
4x - 4 = 4x + (-4) ---> 4x - 4 = 4x - 4
done
compare with y=mx+c
then
y=4-2x
y=-2x+4
c=4,m=-2
