Indicate which property is illustrated in Step 5.

Step 1 2x + 3 + 9x + 11 = (2x + 3) + (9x + 11)
Step 2 = 2x + (3 + 9x) + 11
Step 3 = 2x + (9x + 3) + 11
Step 4 = (2x + 9x) + (3 + 11)
Step 5 = (2 + 9)x + (3 + 11)
Step 6 = 11x + 14

arithmetic fact
commutative
associative
distributive

Question

Indicate which property is illustrated in Step 5.

Step 1	2x + 3 + 9x + 11	=	(2x + 3) + (9x + 11)
Step 2		=	2x + (3 + 9x) + 11
Step 3		=	2x + (9x + 3) + 11
Step 4		=	(2x + 9x) + (3 + 11)
Step 5		=	(2 + 9)x + (3 + 11)
Step 6		=	11x + 14

    arithmetic fact
    commutative
    associative
    distributive

anonymous · Answer

$ac + bc = (a + b)c$
What property is that?