3x-10+x+8=90
4×-2=90
4x=92
X=23
One angle is 31. 23+8
The second one is 59. 3 (23)-10
        
             
        
        
        
It simple ☺ idk how to help u. hope this ll help u understand. place ur pencil on B's dot n make it move 3 units to the right then 2 units to the up. same goes to A n C. u ll get the ans.
        
                    
             
        
        
        
The answer would be f(x)= 15
        
             
        
        
        
Do you need to show your work ?
        
             
        
        
        
Answer:
Option A.
Step-by-step explanation:
The given matrix is
![\left[\left.\begin{matrix}4 & 5\\ 7 & -4\end{matrix}\right|\begin{matrix}-16\\ 23\end{matrix}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cleft.%5Cbegin%7Bmatrix%7D4%20%26%205%5C%5C%207%20%26%20-4%5Cend%7Bmatrix%7D%5Cright%7C%5Cbegin%7Bmatrix%7D-16%5C%5C%2023%5Cend%7Bmatrix%7D%5Cright%5D) 
We need to find the system of equations which is represented by the matrix.
In the given matrix first row represents the first equation and second row represents the second equation of the system of equations.
Let two variables are x and y.
First column represents the coefficients of x and second column represents the coefficients of y.
Numbers on the right side of the matrix represents the numbers which are right side of the equations.
Now, the required equations are
 
 
Therefore, the correct option is A.