Which of the following correctly demonstrates the Associative Property of Addition?(1 point)

Question

Responses

m⋅(x⋅y)=(m⋅x)⋅y
m times left parenthesis x times y right parenthesis equals left parenthesis m times x right parenthesis times y

y−(x+1)=(y−x)+1
y minus left parenthesis x plus 1 right parenthesis equals left parenthesis y minus x right parenthesis plus 1

(x+y)+z+r=x+(y+z)+r
left parenthesis x plus y right parenthesis plus z plus r equals x plus left parenthesis y plus z right parenthesis plus r

x⋅(y+z)=(x⋅y)+z

Answer 1

The correct demonstration of the Associative Property of Addition is:

$$(x+y)+z+r=x+(y+z)+r$$

This property states that when adding three or more numbers, the way in which the numbers are grouped does not change their sum. Therefore, it is a correct representation of the Associative Property of Addition.