Answer:
![C=\left[\begin{array}{cc}1&4\\1&6\end{array}\right]](https://tex.z-dn.net/?f=C%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D1%264%5C%5C1%266%5Cend%7Barray%7D%5Cright%5D)
Step-by-step explanation:
<u>Matrix Addition</u>
Given two matrices A and B, the sum of A+B can only be defined if both matrices are of the same order, i.e. they have the same number of files and columns. If that was the case, then the sum of A and B, call it C is defined as

In other words, the resulting sum at row i and column j is the sum of the elements in that exact position
We are given the matrices 
![\left[\begin{array}{cc}-2&3\\2&4\end{array}\right] +\left[\begin{array}{cc}3&1\\-1&2\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D-2%263%5C%5C2%264%5Cend%7Barray%7D%5Cright%5D%20%2B%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D3%261%5C%5C-1%262%5Cend%7Barray%7D%5Cright%5D)
Adding them at the same position, we have
![C=\left[\begin{array}{cc}-2+1&3+1\\2-1&4+2\end{array}\right]](https://tex.z-dn.net/?f=C%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D-2%2B1%263%2B1%5C%5C2-1%264%2B2%5Cend%7Barray%7D%5Cright%5D)
![C=\left[\begin{array}{cc}1&4\\1&6\end{array}\right]](https://tex.z-dn.net/?f=C%3D%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D1%264%5C%5C1%266%5Cend%7Barray%7D%5Cright%5D)
Select option c.
 
        
             
        
        
        
Don't have a calculator but it's in between 10 and 20 percent
        
             
        
        
        
My guess would be the second choice - 90 degrees , I tried my best because idk if there’s a picture to this or anything :)
        
                    
             
        
        
        
SA=2lw+2lh+2hw ..........
        
             
        
        
        
150.60 divided by 5/6 is 180.72.