Question

7. Which of the following illustrates the associative property of addition?

(1) x+10=10+x
(2) 4(x+8)=4•x+4•8
(3) x+10+5x = x+5x+10
(4) (7x+5)-2 = 7x +(5-2)

Answer 1

pretty sure its (3) x+10+5x = x+5x+10

Explanation:

associative properties always involve 3 or more numbers, so I assume its 3 as its addition and it has 3 terms.