Answer:
C
Step-by-step explanation:
So we need to understand what is rational numbers? 
Rational number which can be written under this form:  when x any are both integers and y
 when x any are both integers and y 
 
The question here is : Which property would be useful in proving that the product of two rational numbers. In math, when we talk about the product of at least two number, it implies to the multiplication in the operation. 
Here, only answer C:  with the condition
 with the condition  and a, b, c and d are integers. Product of two integers is always an integer..
 and a, b, c and d are integers. Product of two integers is always an integer.. 
 
        
                    
             
        
        
        
To find the inverse, interchange the variables and solve for y.
f^−1(x)=−25+5x/2
        
             
        
        
        
The lines that intersect is B
        
             
        
        
        
Answer:
umm idk let me get back to you
Step-by-step explanation:
 
        
                    
             
        
        
        
<span>To remove any negative sign in front of a number, and to think of all numbers as positive (or zero). Example: |5|=5</span>