Answer:
We substitute
12 = -x - 2
14 = -x or -x = 14
so the answer is -14! 
I am in honors high school algebra and I am 11. Trust me bro. 
Step-by-step explanation:
 
        
             
        
        
        
Area of a circle = pi x r^2
Area of circle = 150,000/ 1578 = 95.06 square miles
95.06 = 3.14 x r ^2
Divide both sides by 3.14
R^2 = 30.27
Find the square root:
R = sqrt(30.27)
R = 5.5
The radius is c) 5.5 miles
 
        
             
        
        
        
Answer:
30 sides
Step-by-step explanation: