4 because when u solve it that’s what you get
        
             
        
        
        
Answer:
<em>The domain of f is (-∞,4)</em>
Step-by-step explanation:
<u>Domain of a Function</u>
The domain of a function f is the set of all the values that the input variable can take so the function exists.
We are given the function

It's a rational function which denominator cannot be 0. In the denominator, there is a square root whose radicand cannot be negative, that is, 4-x must be positive or zero, but the previous restriction takes out 0 from the domain, thus:
4 - x > 0
Subtracting 4:
- x > -4
Multiplying by -1 and swapping the inequality sign:
x < 4
Thus the domain of f is (-∞,4)
 
        
             
        
        
        
Answer:
Number 2 is 3:4. 
Number 1 is d. 
Step-by-step explanation:
Boxers and collies added together gives you 12:16. Divide them both by 4 and you get 3:4. 
<
The number of student in class 4 (6) divided by the total number of kids in the entire class (18) gives you 0.33333333333. Multiply that by 100 and it gives you 33.3333333333. As a percentage it is 33 1/2 %
 
        
             
        
        
        
Answer: The answer is B. 
Step-by-step explanation: The scale on the y-axis could be changed to 100–120.
 
        
             
        
        
        
Answer:
$100 increase
Step-by-step explanation:
500 x 20%
= $100 increase