1 is the answer b/c that's the only number it goes too
        
             
        
        
        
Step-by-step explanation:
10=7-m
10-7=-m
3=-m
m=-3
 
        
                    
             
        
        
        
Answer:
The answer to your question is:   x = 7; y = 6
Step-by-step explanation:
                                              2x+y=20             ( 1 )  Multiply by 5
                                              6x−5y=12            ( 2 )
                                5 (2x+y=20)    = 10x + 5y = 100
                                           10x + 5y = 100
                                             6x − 5y =   12             Eliminate y
                                           16 x        = 112
                                            x = 112 / 16
                                            x = 7
                                  2(7) + y = 20                 Substitution
                                  14 + y = 20
                                  y = 20 - 14
                                  y = 6
 
        
             
        
        
        
The coordinates of B are (14, -10). 
<h3>How to find mid point?</h3>
The midpoint is already know . we can use it to find the coordinates of B.
Therefore,
(xₙ, yₙ) = (x₁ + x₂ / 2, y₁ + y₂ / 2)
Hence,
M(5, - 4) and A(-4, 2)
The coordinates of B are as follows:
 (5, - 4)  = (-4 + x₂ / 2 , 2 + y₂ / 2)
5 = -4 + x₂ / 2
10 = -4 + x₂
x₂ = 14
hence,
-4 = 2 + y₂ / 2
-8  = 2 + y₂
y₂ = - 10
Therefore, the coordinates of B are (14, -10)
Learn more about midpoint here: brainly.com/question/25377004
#SPJ1
 
        
             
        
        
        
The answer is five 5 hope it helps you out :)