The standard for of this equation is x – y = 0
Firstly, options A and D are not in standard form, so they are not options. 
To decided between B and C, we choose a point on the line and see if it works. For example, we'll use (2, 2). 
x – y = 0
2 - 2 = 0 
0 = 0 
This is true for option C. Therefore, it is correct. 
 
        
             
        
        
        
Answer:
3
Step-by-step explanation:
area = l^2 = 9
so,l =  = 3
 = 3
 
        
                    
             
        
        
        
Answer:
C. 97.5 yd
Step-by-step explanation:
The distance between Marsha, the ball and the tee for the fourth hole, forms a triangle.
Thus, the distance between Marsha's ball and the hole can be calculated using the Cosine formula below:
c² = a² + b² - 2abcos(C)
Where,
c = distance between Marsha's ball and the hole = ?
a = distance between the tee for the fourth hole and the tee = 300 yd
b = distance between tee and the hole = 255 yd
C = 18°
c² = 300² + 255² - 2(300)(255)cos(18)
c² = 90000 + 65025 - 153000 × 0.951
c² = 155025 - 145503
c² = 9522
c = √9522 ≈ 97.5
c = distance between Marsha’s ball and the hole = 97.5 yd (nearest tenth)
 
        
             
        
        
        
Answer:
A.
Step-by-step explanation:
x - 9 = 0
   + 9 + 9
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x = 9