Answer:
x  3
 3
Step-by-step explanation:
if  x = 3 then  the rational expression    4 / (x - 3) is undefined
because we get   4/0 = undefined .
 
        
             
        
        
        
Answer:
72 is the least common multiple 
 
        
                    
             
        
        
        
Answer:
12x-6
Step-by-step explanation:
perimeter= 2l+2w
=2(x+4)+2(5x-7)
=2x+8+10x-14
=12x-6
 
        
             
        
        
        
Answer:
The answer is 80, give me brainliest answer:)