A function is something that lets you work out what something is depending a variable 
e.g: x = y + 5
this function states that the unknown x is equal to whatever the variable y is plus 5
        
             
        
        
        
Answer:
y=|x-1|-1
Step-by-step explanation:
hope that helps :)
 
        
             
        
        
        
Answer:
-x + 2y - 36
Step-by-step explanation:
-4(x + 9) + 3(x - y) + 5y
Distribute;
-4x - 36 + 3x - 3y + 5y
Collect like terms;
-1x + 2y - 36
 
        
             
        
        
        
Answer:
klflebfua/l
Step-by-step explanation: