Answer:
A function with a positive constant other than 1 raised to a variable exponent. 
Step-by-step explanation:
 
        
             
        
        
        
The first question asks who sold more rolls. So start with figuring out how many Christie sold. 
5 total - 1 2/3 left = 3 1/3 sold
you can convert the numbers to improper fractions with the same denominator. Like this: 
5 x (3/3) - (3+2)/3 
15/3 - 5/3 = 10/3 
10/3 = 3 1/3 
So now we know Christie sold more because 3 1/3 dozen is more than 2 1/2 dozen. 
The part asks how many more.. Subtract the amounts the two girls sold. 
3 1/3 - 2 1/2 
10/3 x (2/2) - 5/2 x (3/3) 
20/6 - 15/6 = 5/6 
Christie sold 5/6 dozen more rolls. A dozen is 12 rolls so if you wanted to go further you just multiply 12 x 5/6 = 10 rolls 
        
             
        
        
        
Answer:
In basicallity if a question such as this pops up, the correct way to go would first be to graph this. y=x-4 would be equivalent to x=4. 
My paper work is below:
y = x - 4
0 = x - 4
-x = -4
x = 4
Hope this helped..
 
        
             
        
        
        
Answer:
D. im not realy sure.but there