The way that you would do this is by taking 

 out of the binomial, or as I like to think about it, 'un-distributing'. :p

 out of 

, you end up with 

. 
When you take 

 out of 

, you get 

. 
Put it together, and the solution is 

 - 

.
Hope I helped!! 
 
        
        
        
C(n)=2.00+3.20n
If n = 4 miles:
C(4)=2+3.20(4)
C(4)=2+12.80
C(4)=14.80
The cost of the taxi is $14.80.
 
        
             
        
        
        
Answer:
p=-6
q=3
Step-by-step explanation:
5p-3q=-39 
-2p-3q=3 
Multiply the second equation by -1
2p +3q = -3
Add the first equation and the modified second equation
5p-3q=-39 
2p +3q = -3
---------------------
7p = -42
Divide by 7
7p/7 = -42/7
p = -6
Now we can find q
2p +3q = -3
2(-6) +3q = -3
-12 +3q = -3
Add 12 to each side
-12+12 +3q = -3+12
3q = 9
Divide by 3
3q/3 = 9/3
q=3
 
        
                    
             
        
        
        
This is an A. <span>observational study. They are observing the use of cell phones differs between people with or without cancer.
Happy studying ^-^</span>