Formula for circumference:  C = 2pi*r
This becomes 201 cm = 2(3.14) r
Divide both sides of this eqn by 6.28:
201
------- = r  = 32 cm (approx).
6.28 
        
             
        
        
        
X^2 + 30x + 21
=   ( x + 15)^2 - 225 + 21
= (x + 15)^2 - 204
Its D  minimum at -204
        
                    
             
        
        
        
The first thing that shoyuld be noted is that you have linear functions here : straight lines in your graph
        
             
        
        
        
Answer:
D
Step-by-step explanation:
Factors B, C and E are totally irrelevant.
 
        
                    
             
        
        
        
To find y, divide the first equation by 2.
  y = 4
To find x, use that value for y in the second equation. Add 4, then divide by 2.
  15·4 = 2x -4
  60 +4 = 2x
  64/2 = x = 32
The solution is (x, y) = (32, 4).