Which statements are true about the graph of the function h(x) = –5x2 + 60x – 200? Select three options. The axis of symmetry is the line x = –6. The graph of h(x) will not intersect the graph of the parent function, f(x) = x2. The vertex of the graph is at (6, –20). The parabola has a maximum. The value of k, when the equation is written in vertex form, is –200.

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.