The equation of a circle with center  and radius
 and radius  is
 is

In your case,

Plug these values into the generic formula and you'll get your equation.
 
        
             
        
        
        
8.71428571429 is the answer
        
             
        
        
        
With all the stuff added together, the sum is 2.03 kg
 
        
             
        
        
        
Answer:
1- 4.76 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
$2.75 = cost of a hot dog
$4.50 = cost of a cheeseburger
Step-by-step explanation:
Let x = cost of a hot dog
      y = cost of a cheeseburger
(1)      2x + 4y = 23.5           (2)    5x + y = 18.25    
                                                            y =  18.25 - 5x
         2x +4(18.25 - 5x) = 23.5
          2x + 73 - 20x = 23.5
          -18x + 73 = 23.5
                   -18x = -49.5
                        x = 2.75                       y = 18.25 - 5(2.75)
                                                            y = 18.25 - 13.75
                                                            y = 4.50
$2.75 = cost of a hot dog
$4.50 = cost of a cheeseburger