Which property was used to simplify the expression? 4 (b + 2) = 4b + 8

A: distributive property

B: commutative property

C: associative property

D: inverse property

This would be A, the distributive property. The distributive property means that you distribute (multiply) the 4 into each integer in the parenthesis. So its basically 4·b + 4·8

4 (b + 2 = 4b + 8 is the distributive property

The 4 is multiplied through the parenthesis