Given the expression :
[tex]\frac{1}{2}m-54[/tex]We need to find the value of the expression when m = -50
So, substitute with m at the expression :
[tex]\begin{gathered} \frac{1}{2}m-54 \\ \\ =\frac{1}{2}\cdot-50-54 \\ \\ =-25-54=-79 \end{gathered}[/tex]So, the answer is : -79
