Answer:

Step-by-step explanation:
we have

we know that

substitute

 
        
             
        
        
        
Answer:
2
Step-by-step explanation:
-13 x 2 = -26
 -4 x 2 = -8
14  x 2 = 28
-26 + -8 + 28 +-9 = -15
have a nice day and mark me brainliest! :)
 
        
                    
             
        
        
        
Answer:
The son is 10, and the father is 50.
Step-by-step explanation:
10 times 5 would be 50, and 50+10 is 60.
 
        
                    
             
        
        
        
Answer:
i√19
Step-by-step explanation:
Because √(-19) = √(-1)√19, and because √(-1) = i, we get i√19
 
        
             
        
        
        
A number that has a negative sign in front of it, opposite from positive numbers, and below zero are all phrases that can describe negative numbers. 
Hope this helps.