Answer:
1 008.56628 US$ kkkkkkkkkk
 
        
                    
             
        
        
        
139 + 30d = 13 + 51d
139 - 13 = 51d - 30d
126 = 21d
126/21 = d
6 = d
now lets check..
139 + 30d = 139 + 30(6) = 319
13 + 51d = 13 + 51(6) = 319
so on day 6, they will both cost $ 319
        
             
        
        
        
Answer:
(2x+3)*(x+3)
Step-by-step explanation: