Pick more then one below each 1-3 help me out please 1.
A. (2x - 1)(x+9)
B. (2x - 1 (x-9)
C. x+7
D.3x(x-9)

2.
A.3x(x+7)
B.3x(2x+1)
C. x-7
D. x+7

3.
A.-0.5
B.-7
C.0.5
D.9
E. 0​

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.