Which property is being illustrated?

Question

(commutative, associative, distributive)

1) 3a + 2b = 2b + 3a
2) 3(a + 2) = 3a + 6
3) 3(2 + a) = 3(a +2)
4) (3⋅ 2)a = 3(2a)

THANK YOU!!

Answer 1

commutative: a+b = b+a or a*b = b*a
associative: (a+b)+c = a+(b+c) or (ab)c = a(bc)
distributive: a(b+c) = ab + ac

now decide