$18.46
Because gerome collected $9.23 and I mult. 2 times and my answer is: $18.46
        
             
        
        
        
√((25x^9y^3)/(64x^6y^11))  doing the normal division within the radical
√((25x^3)/(64y^8)  then looking at the squares within the radical...
√((5^2*x^2*x)/(8^2*y^8))  now we can move out the perfect squares...
(5x/(8y^4))√x
So it is the bottom answer...
        
             
        
        
        
Answer: -0.125
Explanation: −3/4 + 5/8 = -0.125
Hope this helps