Suppose about 400,000 people live in an areas of 160 square miles. What is the best estimate for the population density?

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

According to the data set, where should the upper quartile line of the box plot be placed?

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.