Answer:
A
Step-by-step explanation:
We have the equation: 

Take the derivative of both sides with respect to x: 
![\frac{d}{dx}[x^2+xy-3y]=\frac{d}{dx}[3]](https://tex.z-dn.net/?f=%5Cfrac%7Bd%7D%7Bdx%7D%5Bx%5E2%2Bxy-3y%5D%3D%5Cfrac%7Bd%7D%7Bdx%7D%5B3%5D)
Implicitly differentiate: 

Solve for dy/dx: 

Divide: 

To find dy/dx at (2, 1), substitute 2 for x and 1 for y. So: 

Hence, our answer is A. 
 
        
             
        
        
        
Answer:
p(not 5) = 5/6
Step-by-step explanation:
The probability that we roll a 5 is 1/6. So, the probability we don't roll a five is simple 1 minus that:

And that's your answer.
 
        
             
        
        
        
Answer:
the slope is:1 the y-intercept is:3 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
B.   
Step-by-step explanation:





