Given the data set below, if you were creating a histogram, what would be the frequency of the interval 50-59? Type the correct number, do not answer in words.
3, 5, 5, 9, 10, 13, 15, 16, 18, 18, 20, 20, 21, 25, 26, 27, 29, 29, 31, 34, 37, 38, 38, 38, 38, 41, 46, 47,
49, 49, 52, 53

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.