Answer:
2z-12
Step-by-step explanation:
distribute 2 to the z and the 6
z times 2 = 2z
6 times 2= 12
 
        
             
        
        
        
<h3>
Answer: Comelia is correct</h3>
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Explanation:
We're told that "Christopher  says that all Rational (Q) numbers are Whole (W)", which makes Christopher not correct. Some rational numbers are whole numbers. For instance, the number 7 = 7/1 is rational and it's a whole number as well. 
However something like 1/2 is rational, but it's not a whole number. A whole number doesn't have any fractional or decimal part to it. It can be thought of the number of something. 
Comelia is correct because all whole numbers are rational. If x is some whole number, then x = x/1 is rational as well. Replace x with any whole number you want. Her statement does not work in reverse as shown above. 
When drawing a Venn diagram, the circle for "whole numbers" will be entirely inside the circle for "rational numbers", and not the other way around. 
 
        
        
        
Answer:
<h2>-8</h2>
Step-by-step explanation:
6y - 8 = c + 6y        <em>subtract 6y from both sides</em>
6y - 6y - 8 = c + 6y - 6y
-8 = c
The equation has an infinite many solutions if when we get a true equation with no variable y.
Therefore c = -8
 
        
             
        
        
        
I think its 40.7 but not too sure
        
                    
             
        
        
        
B is the most logical answer