The answer would have to be 1.
        
             
        
        
        
I don’t know how to solve its very hard sorry I can’t even solve it ;(
        
             
        
        
        
X is equal to 1
hope it helps
        
             
        
        
        
The like terms: 5x^3 and x^3
        
             
        
        
        
Answer:
B
Step-by-step explanation:
perimeter is the sum of all sides. it's the distance around the figure.