Answer:
Step-by-step explanation:
Find the greatest common factor of 12x + 8
4(3x + 2)  so one side is 4 and the other is 3x + 2
 
        
             
        
        
        
A negative plus a positive equals a negative 
        
                    
             
        
        
        
Answer: D is correctly written in scientific notation.
Step-by-step explanation:
The base has to be between 1 and 10.
A has a base of 16.4 which is greater than 9.
B is not even in scientific because the base it being raise to an exponent 
C has 0.71 as base which is less that.
 
        
             
        
        
        
This is the answer I hope this will help you