Enter a positive common factor (other than 1) of the fraction's numerator and denominator. 9/15

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2

Can someone plz me with 11,12,13 plz show work