In the expression \( 5(g+2) + 3(h-4) \), the first property of operations that should be applied is the distributive property. This property allows you to distribute the multiplication over addition inside the parentheses.
So, you would apply the distributive property to rewrite the expression as follows:
\[ 5(g + 2) = 5g + 10 \] \[ 3(h - 4) = 3h - 12 \]
Thus, the correct answer is distributive property.