The area would be 19.625- inches
        
             
        
        
        
Sorry hun I’ve never learned that
        
             
        
        
        
She used 10 more gallons of green paint 
Hope this helps if it does yourwelcome
        
             
        
        
        
Answer:
   see below
Step-by-step explanation:
List the coefficients and constant for an equation in one row of the matrix. The variables should be in the same order. Any missing terms are replaced by zero.
   ![\left[\begin{array}{ccc|c}9&-4&-5&9\\7&4&-4&-1\\6&-6&1&-5\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Cc%7D9%26-4%26-5%269%5C%5C7%264%26-4%26-1%5C%5C6%26-6%261%26-5%5Cend%7Barray%7D%5Cright%5D)
 
        
             
        
        
        
Divide 83.524 by pi then take half of that answer .
the answer should be 13.29 or 13.3