Answer:
m∠A = 9°
Step-by-step explanation:

 
        
             
        
        
        
They cancel out, so you can decide from this 10x-20=10x-20. 
Hope this answer will help!
        
             
        
        
        
Answer: it's not D i thought it was and I got it WRONG!!!
 
        
                    
             
        
        
        
Answer:
The coordinates of point B are (5,-3)
Step-by-step explanation:
we know that
The formula to calculate the midpoint between two points is equal to

In this problem
Point A is at (-5, -4) and point M is at (0, -3.5)

substitute in the formula

so
Solve for x_2

Solve for y_2

therefore
The coordinates of point B are (5,-3)