5hour job 70 dollars for parts total charge was 320. choose an equation

Place the following steps in order to complete the square and solve the quadratic equation,

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

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.