- What is the equation of the line that passes through point (4, 12) and has a y-intercept of -2? a. Y space equals space 5 over 2 x space minus space 2
b. y space equals space 7 over 2 x space minus space 2
c. Y = 2x - 2
d. Begin mathsize 20px style y space equals space 6 x space minus space 2 end style

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.