Which equation demonstrates the additive identity property?

See Explanation

Step-by-step explanation:

The options are not given; however, you can take a clue from my explanation to answer your question

Let x be a real number;

Additive identity property implies that; adding x to 0 or 0 to x gives x;

In other words;

Note that x can be replaced with any real number; Take for instance

There are uncountable number of examples;

However, take note that adding 0 to a given digit results in the exact digit and that's the implication of addition identity property

yes

step-by-step explanation:

they have to be opposite and reciprocal of eachother.

to find the perimeter, you add up all the lengths of the sides. in this case you would have to add up 18+22+40+80 which equals 160.