Solve this system by rewriting the statements into a set of 2 equations, then solve the equations using the addition method. the sum of two numbers is 8. the difference between the two numbers is 2. what are the two numbers?

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.

Find the solution on the interval [0, 2pi)

If f(x) = 3x-2 and g(x) =2x+1 find (f-g)(x)