<span>given:
   bull's eye radius= x
 width of surrounding rings=y
   solution:
   Radius of the circle=x+4y
Area of the outermost ring=Area of the circle-Area of the penultimate ring
=Ď€(x+4y)^2-Ď€(x+3y)^2
=Ď€(x^2+8xy+16y^2-x^2-9y^2-6xy)
 =Ď€(2xy+7y^2)
 hence the area of the outermost ring in terms of x and y is Ď€(2xy+7y^2).</span>
        
             
        
        
        
Answer:
:) 17 
Step-by-step explanation:
68 = 4 x L
68 div by 4 = 17
the length is 17 
 
        
                    
             
        
        
        
I am absolutely sure that the task <span> b = 3, then 3x + y = 1 and bx - y = 3 is NOT parallel, which means that the statement represented above is FALSE.
To make sure you can check it using : </span>

 Hope now it's obvious. Regards!
 
        
             
        
        
        
Answer:
$2200
Step-by-step explanation:
200×10=2000
2000+(2000÷10)=2200