3 is what I think the answer would be. 3 + 1 is 4, 4 is not a prime number, 3 is prime.
        
                    
             
        
        
        
Answer:
O y = (x + 5) (x + 3)
Step-by-step explanation:
y = (x + 4)² - 1
y = x² + 8x + 15
y = x² + 3x + 5x + 15
y = x(x + 3) + 5(x + 3)
y = (x + 5) (x + 3)
 
        
                    
             
        
        
        
Answer:
I think $10 is the answer
 
        
                    
             
        
        
        
13,822 to one significant figure is 10,000
623 to one significant figure is 600
14 to one significant figure is 10
10,000 times 600 = 6,000,000
6,000,000/10 = 600,000