Will give a

write an inequality for the situation.
there are below 89 boys in the theater.

a.
number of boys < 89
c.
number of boys > 89
b.
number of boys ≤ 89
d.
number of boys ≥ 89

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.