<em>The answer is:</em>

<h2>
Explanation:</h2>
The additive identity property states that if you add any real number to zero or add zero to any real number, you will get the same real number back. In other words:

Here we have that:

So by the mentioned property:

In other words:

<h2>Learn more:</h2>
Distributive property: brainly.com/question/12256474
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The ratios of side lengths in a 30-60-90 triangle are 1 : √3 : 2.
The longer leg is ...
B: 2 times the length of the shorter leg
Answer:
21
Step-by-step explanation: hoped I helped
Don't know how to explain this question