A. 2
b. 0
c. -2
d. 0
f(x) just means that the number in the parentheses is the x-value and if it asks for f(x) it wants the y-value at that x point
        
             
        
        
        
Answer:
19 or 21.
Step-by-step explanation:
I swear. 
5 + 5 = 10
10 + 5 = 15
15 + 4 = 19
________________
9 + 9 = 18
18 + 10 = 28
28 - 5 = 23
There are two nines so 
23 - 2 = 21
 
        
             
        
        
        
B= -42 C= -38 
So the difference going up to positive is 4 and the difference going down in negative is -4.
        
             
        
        
        
Answer:
3 1/3x + 1 = 24
3 1/3x =23
x= 6.9
Step-by-step explanation:
3 is added to 1/3 and a number always means x or another letter, and then you put them all together you can simply solve the equation as shown above.