You have 10 colored pencils (2 green, 3 blue, 4 red, 1 purple) : G G B B B R R R R P. You choose 1 pencil (without replacement) then your friend chooses 1 pencil. Find the probability of the event. Show your work and your final answer. P(choose 1 blue and 1 green) =

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.