Answer:
3x+1=3x+1
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
U DIVIDE IT!!
Step-by-step explanation:
 
        
                    
             
        
        
        
We use the pithagorean formula: x^2 = 130^2 - 50^2 = 16900 -2500 = 14400;
then, x = 

 = 120 feet has the other dimension of the lot.
 
        
        
        
x stands for a variable, in which the variable would be replaced by a number(s) that would make the equation true.
Hope this helps