Are the expression equivalent when x equals 2? 7^2 + 4x and 4x + (7×7)

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.

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.

Can someone me with this graph problem by the way i need to know the answers by today since this assignment is due ! !