Question

identify the property demonstrated
(a) (-7)+0= -7
(b) (-9)-9=0


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Answer 1

To find: The property demonstrated

(a) (-7)+0= -7

(b) (-9)-9=0

(a) (-7)+0= -7

Identity property in addition  : a+0=a

The identity property for addition tells us that zero added to any number is the number itself.

Here, 0 is the additive identity.

(b) (-9)-9=0

Additive property identity: a+(-a)=0

The additive inverse property states that adding a number and its inverse results in a sum of 0.

Here, -9 is the additive inverse of 9.

Hence, the property demonstrated (a) is "Identity property in addition " and (b) is "Additive property identity".

Answer 2

additive identify

additive inverse