1] y - 3x = -8
  [2] y + 9x = 4
 -3x + y = -8 9x + y = 4 
Solve equation [2] for the variable y 
 [2] y = -9x + 4
// Plug this in for variable y in equation [1]
 [1] (-9x+4) - 3x = -8
 [1] - 12x = -12
// Solve equation [1] for the variable x 
 [1] 12x = 12 
 [1] x = 1 
// By now we know this much :
 y = -9x+4
 x = 1
// Use the x value to solve for y 
 y = -9(1)+4 = -5 
 {y,x} = {-5,1} 
        
             
        
        
        
Answer:
A.
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
-5,-3,-1,1,3
Step-by-step explanation:
range= y
really need brainliest!!
 
        
                    
             
        
        
        
Hello there i hope you are having a good day :) Your question : The cost of 12 oranges and 7 couples is 55.36. Eight oranges and apples cost $3.68. Find the cost  of each : Firstly you would do oranges = O Apples = A. Then 12 oranges + 7 apples = 5.36 12o + 7A = 5.36 then you would take away from both sides so -12o Take away -12o = 7o = 5.36 - 12A now you would divide this by 7 so 7 cancels each out so you are left with 5.36/ 7 = 0.76 Then it would equal 0.76 - 12o/7 This would equal the amount of apples to be $0.76 each now for the oranges you would do the same that you work out for the apples.
Hopefully that help ya :)
 
        
             
        
        
        
57 degrees because vertical angles are the same measure