If f(x) = (x - 1)2 - 2 what is the equation for the axis of symmetry y = -2
x = 1
y = 2
x = -1

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

Whats the name of the vertical axis

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.