You leave school and the end of the day and walk 3/8 of a mile away before realizing that you left your backpack, and immediately turn around. You then walk 1/6 of a mile back towards school. At this point, assuming you walked in a straight line, how many miles are you from school now? (I will give to the first person that answers it correctly and fastest

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.