-2, -2, -2, +2
-2 + -2 + -2 + 2
-2 -2 -2 + 2
-6 + 2
-4
-4/ 4 = -1
His average is -1
        
                    
             
        
        
        
Step-by-step explanation:
f°g=




if the denominator is zero the number is undefined which makes it not in the domain of the function
set  equal to 0
 equal to 0
the values for x is 0 or 6
so the only value that is not in the domain of f°g is 0 and 6
Hope that helps :)
 
        
             
        
        
        
The second leftover expression is not o(a+b). It is 6(a + b). I have attached the correct question to depict that. 
Answer:
The equivalent expressions are;
8a + 2 and 6a + 6b
Step-by-step explanation:
The two leftover expressions are given as;
2(4x + 1) and 6(a + b)
In algebra, equivalent expressions are simply those expressions which when simplified, give the same resulting expression as the initial one. 
Thus simply means expanding or collecting like times to make it clearer. 
Now, in our question, like terms have already been collected. This means that to find an equivalent expression, we will just expand the bracket. 
Thus;
2(4x + 1) will be expanded by using the 2 outside the bracket to multiply the terms inside the bracket. This gives;
8x + 2
Similarly, 
6(a + b) will be expanded by using the 2 outside the bracket to multiply the terms inside the bracket. This gives;
6a + 6b
Thus;
The equivalent expressions are;
8a + 2 and 6a + 6b
 
        
             
        
        
        
Answer:
4.82
Step-by-step explanation:
0.000082 + 0.0004 = 0.000482 = 4.82
 
        
                    
             
        
        
        
Answer: There are approximately 853827 new cases in 6 years.
Step-by-step explanation:
Since we have given that 
Initial population = 570000
Rate at which population decreases is given by

Now,
First year =570000
Second year is given by

Third year is given by

so, there is common ratio ,
it becomes geometric progression, as there is exponential decline.
so, 

a=570000
common ratio is given by

number of terms = 6
Sum of terms will be given by

We'll put this value in this formula,

So, there are approximately 853827 new cases in 6 years.