[tex]\frac{36x-100y}{6\sqrt{x}-10\sqrt{y}}-4\sqrt{y} =\frac{(6\sqrt{x}-10\sqrt{y})(6\sqrt{x}+10\sqrt{y})}{6\sqrt{x}-10\sqrt{y}} -4\sqrt{y}=6\sqrt{x}+10\sqrt{y}-4\sqrt{y}=6\sqrt{x}+6\sqrt{y}=6(\sqrt{x}+\sqrt{y})=6*93.09=558.54[/tex]