Answer:
60% of $70 is $42, so i think its $42 
 
        
                    
             
        
        
        
Answer:
The rational number 1 is the multiplicative identity for rational numbers.
Step-by-step explanation:
I hope this will help you buddy 
 
        
             
        
        
        
The equation is false because the real answer is z5/4. The variable doesn't just disappear.
        
                    
             
        
        
        
Yes it is. Input the numbers into the pythagorean theorem, 

 and if they equal each other it is a right triangle.