Answer:
B
Step-by-step explanation:
hope this help but I worked it out so it should be true
 
        
             
        
        
        
Answer:
C
Step-by-step explanation:
1.58 x n = z
another way of showing:
z = 1.58n
 
        
             
        
        
        
Answer:
It's the second option -> y = 1/2x -1
 
        
             
        
        
        
Yes 2,1 is a solution of this problem