Answer:
X = [-5 -1 2 1] - [-1 -2 4 8] = [-4 1 -2 -7]
 
        
             
        
        
        
Answer:
Step-by-step explanation:
y = 3x + 4
Plugin x = 3 in the equation,
y = 3*3 + 4
  = 9 + 4
y = 13
Plugin x = 4 in equation,
y = 3*4 + 4
   = 12 + 4
y = 16
Plugin x = 5 in the equation,
y = 3*5 + 4
   = 15 + 4
y = 19
2) y =x - 7
Plugin x = 10 in the equation
y = 10 - 7
y = 3
Plugin x = 15 in the equation
y = 15 - 7
y = 8 
Plugin x = 20 in the equation
y = 20 - 7
y = 13
 
        
             
        
        
        
For this case we must simplify the following expression

We know that, by definition:

So, rewriting the expression we have:

We add similar terms taking into account that:
- Equal signs are added and the same sign is placed.
 
- Different signs are subtracted and the major's sign is placed:
 

Answer:
