f(x)= -2 (x - 2) ( x - 4)
if x=2 ⇒ f(x)=y=0 ⇒ graph of f(x) intercept x axis in (2,0)
if x=4 ⇒ f(x)=y=0 ⇒ graph of f(x) intercept x axis in (4,0)
if x=0 ⇒f(x)= -2 *(-2)*(-4)= - 16 ⇒ graph of f(x) intercept y axis in (0,- 16)
⇒ f(x)= -2 (x - 2) ( x - 4) is the answer
        
                    
             
        
        
        
Answer:
(0, 11) is a solution.
(8, 12)  is a solution.
(16, 13) is a solution
(1, 89/8)   
(2,  45/4)
Step-by-step explanation:
y = 1/8x + 11
for this equation....
y = (1/8) x + 11
let x = 0  get
y = 0 + 11 = 11
(0, 11) is a solution.
(8, 12)  is a solution.
(16, 13) is a solution
(1, 89/8)   because    y = 1/8 + 11 = 1/8 + 88/8 = 89/8 
(2,  45/4)
 
        
             
        
        
        
Tape diagrams are simple. Look at the picture I put in the comments
        
                    
             
        
        
        
Since it is not mentioned in the problem, we will assume that repeating of number is allowed.
For the first wheel, you have 10 possible digits.
For the second wheel, you have 10 possible digits.
For the third wheel, you have 10 possible digits.
10 x 10 x 10 = 1000
The probability that someone randomly guesses the correct combination in his first attempt is 1/1000.
If this was without repeat, then 
10*9*8 = 720
The probability that someone randomly guesses the correct combination in his first attempt is 1/720.
        
             
        
        
        
Step-by-step explanation:
Do you still need the answer to this?