Answer:
Several ways, take the diameter and divide it by half.
Take the circumference "C" and r = C/2π
Step-by-step explanation:
 
        
             
        
        
        
Answer:
The answer I believe is -185 1/7
Step-by-step explanation: 
I followed PEMDAS.
 
        
                    
             
        
        
        
1 is the value of a ther is always a imaginary 1 infront of a letter
        
             
        
        
        
First, let's simplify the equation.



- Apply the Distributive Property to the right hand side of the equation

- Subtract  from both sides of the equation from both sides of the equation
Since the right and left sides of the equation are equal, we know that there must be an infinite number of solutions. This means that there is an infinite amount of values that we can substitute for  for the equation to be true.
 for the equation to be true.
 
        
                    
             
        
        
        
(76.4)(0.32)(R - 112) + (0.35)(20R + 435) = 54
24.448(R - 112) + 7R + 152.25 = 54
24.448R - 2738.176 + 7R + 152.25 = 54
31.448R - 2585.926 = 54
31.448R = 54 + 2585.926
31.448R = 2639.926
R = 2639.926/31.448
R = 83.9457