Answer:
z=3.3 repeating
Step-by-step explanation:
Move all terms that don't contain  z  to the right side and solve.
 
        
             
        
        
        
Answer
Secured
Step-by-step explanation:
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Answer:
when you subtract a negative number the two negative signs cancel out and it turns to a positive number 
Step-by-step explanation:
in -6 - (-2)
the two - signs cancel out so it ends up being 
-6+2 which is why it equals -4
 
        
                    
             
        
        
        
The answer is -3, hope this helps!
 
        
             
        
        
        
Width=w
length=(40-2w)/2=20-w
A=w(40-w)
A=40w-w² 
A'=40-2w=0
2w=40
w=20
20x20 is the size of the pen having the greatest area. this tells us the largest rectangle for a given perimeter is a square