Answer:
B
Step-by-step explanation:
the opposite angles of the quadrilateral ABDC are supplementary , that is
∠ BDC + 40° = 180° ( subtract 40° from both sides )
∠ BDC = 140°
Don't hold me accountable but I believe it is the 2nd equation.
we have
we know that
C. y≤-1/3x+1