Two lines that have the same slope do not intersect at any points. Two lines that have different slopes intersect at exactly one point.

True, True for some cases, False
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What is the quadric regression equation that fits these data

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.

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie