5.   r • 1 = r  

Commutative Property of Addition

Identity Property of Multiplication ***

Commutative Property of Multiplication

Identity Property of Addition

6.(5y + 2) + 14x = 5y + (2 + 14x)  

Associative Property of Addition

Associative Property of Multiplication ***

Commutative Property of Addition

Commutative Property of Multiplication

7.   (m •n) •p = m • (n •p)

Commutative Property of Addition

Commutative Property of Multiplication

Associative Property of Addition

Associative Property of Multiplication ***

2 answers

you're correct
#6: Associative Property of Addition

there's no multiplication going on.