$210.67 is the answer. Rounded, of course, from 210.666666667
I believe the correct answer is B. :)
First problem: 10x^2-21y^2/18xy
second problem: 13m-4n/10
<h2>
Answer:</h2>
27 km²
<h2>
Step-by-step explanation:</h2>
<em>I hope this helps you</em>
<em>:)</em>