Expression 1: "y" greater than or equal to negative "x" plus .5 times left bracket, negative 30 , negative 29...3 0 , right bracket minus .2 5 left brace, "y" less than or equal to negative "x" plus .5 times left bracket, negative 30 , negative 29...3 0 , right bracket , right bracey≥−x+.5·−30,−29...30−.25y≤−x+.5·−30,−29...30