Question

Pls help (pic above)

also: expression was rewritten using?
a.commutative property of addition

b. associative property of addition

c. distributive property

d. Commutative property of multiplication

e.Associative property of multiplication

Answer 1

(7+5)+1 equals 12+1 which equals 13 7+(5+1) equals7+6 which equals to 13

Explanation:

b: associative property of addition

Answer 2

`(7 + 5) + 1 = 12 + 1 = 13 \\ 7 + (5 + 1) = 7 + 6 = 13 \\ here \: we \: use \: assosiative \: \: property \\ of \: addition\\ option (b) \\ \: thank \: you`