PLEASE HELP ME!!!









Which statement shows the associative property of addition?

(u + 7) + 13 = u + (7 + 13)

If m + 3 = 18, then 18 = m + 3.

3⋅(5⋅x)=(3⋅5)⋅x

21 + 2y = 2y + 21

Respuesta :

associative property of addition and answer is 
(u + 7) + 13 = u + (7 + 13)
(u + 7) + 13 = u + (7 + 13) is your answer.

Hope this helps! :)