The distance between two lakes is 300 miles. on a map, the measured distance between the lakes is three-fourths of an inch. what is the scale of the map?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

If the discriminant if a quadratic equation is 4 which statement describes the roots?

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.