Since you're adding x feet to the length which is 12 feet:
New area: (12+x)10.5

<h3>
step by step explanation </h3>
● area of regular polygon Formulas ,
⟹
● now finding the area of regular polygon,
⟹
⟹
⟹
Hope it's helps you
If that helps, but I'm pretty sure the answer is -1 that is what I have found in Google that is what all the answers are that in finding.
Answer: look at the minimum in the graph
Step-by-step explanation: Minumum as in of the graphed thing and the minimum/maximum of it or the answer to y or x because that’s impossible
Answer:
Domain
Step-by-step explanation:
Input Values Form the Domain of the Function
Mathematicians call the set of all input values for a function its domain.