Ihave attached a picture. the question i need an answer for is 'question 3'. : )

What is the inverse of the function f(x)=4x+8

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .