The answer is 9x^8 
Hope it helped!!
        
                    
             
        
        
        
Answer:
208°
Step-by-step explanation:
 
        
                    
             
        
        
        
Given 
Rob is twice Joshua's age
Nick is 5 years older than Joshua. 
sum of all their ages is 45.
Find the age of nick.
To proof
As given
Rob is twice Joshua's age
let  Joshua's age = x
than Rob age = 2x
Nick is 5 years older than Joshua. 
Nick age = 5 + x
sum of all their ages is 45
than the equation becomes
Joshua's age + Rob age + Nick age = 45
put the value
x + 2x + 5 + x = 45
4x = 40
x = 10 
Joshua's age = 10 year
than Rob age = 20 year
Nick age = 5 + 10 
                 = 15year
Hence proved
 
        
             
        
        
        
<span>(4,5); r= square root of 12</span>