Answer:
20-15z
Step-by-step explanation:
-1+21-15z
20-15z
 
        
                    
             
        
        
        
Answer:
4. slices 
Step-by-step explanation:
because If you turn 3/5 in to a decimal you get 0.6 and each slice of cheese weighs 0.15 so you do 0.6 divided by 0.15
 
        
             
        
        
        
Answer: y=3x+2
Step-by-step explanation:
y=mx+b
Plug in point (x,y)-->(6,8) m=3
8=3 (6) +b
2=b
 
        
             
        
        
        
Easy if you know the formula
all this means is that your x value is a, and when it is, will give you the value 26.
f(a) = 6a - 4 = 26
6a = 30
a = 5