Can somebody me with some math questions?

in advance, i will give to best answer.

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3

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.