Answer: The probability of getting a white is POSSIBLE and the probability of not getting a white is black
Step-by-step explanation:
 
        
             
        
        
        
Knowing she makes $9 for each 1 hour, you know that if you'd need to find how much she made after 4 hours, you would do 9(4), giving you the answer of $36. 
With this knowledge, you can replace the 4 with h.
9(h)=P
The reason why it's such a simple equation is because it's per hour and nothing else is being increased, decreased, or changed. 
Hope this helps!
        
             
        
        
        
For this case we have the following system of equations:

Equating both equations we have:

We must find the solutions, for this we factor. We look for two numbers that, when multiplied, result in 4 and when added, result in 5. These numbers are 4 and 1:

Then, the factorized equation is of the form:

Thus, the solutions are:

We look for solutions for the variable "y":

Thus, the system solutions are given by:
ANswer:

 
        
             
        
        
        
X=4 Y=3 djdndndjdnsnsndbdbdbdd