# Math Help - please help with math name property of real numbers

1. ## please help with math name property of real numbers

I'm stuck on these please help

Name the property of real numbers that justifies each statement.

(2) a) (4 + y) + 12 = (y + 4) + 12 Associative

(2) b) (y + 4) + 12 = y + (4 + 12) Inverse

(2) c) where x ≠ 0 Commutitative

(2) d) Additive

(2) e) 5(7x + 2) = 5(7x) + 5(2) ?

2. Originally Posted by fancyface
I'm stuck on these please help

Name the property of real numbers that justifies each statement.

(2) a) (4 + y) + 12 = (y + 4) + 12 Associative
This is called commutative property,
$4+y=y+4$
(2) b) (y + 4) + 12 = y + (4 + 12) Inverse
This is called associative property.
(2) c) where x ≠ 0 Commutitative

(2) d) Additive
I think you are missing something.
(2) e) 5(7x + 2) = 5(7x) + 5(2) ?
Left-distributive. (But it really does not matter for commutative rings).