问惠3 policy urban suburban rural 如何瘿邻下列语句： build roads -2 5 3 gun control 8 2 -5 Although we cannot easily graph farm subsidies 0 0 10 linear programs with more than two gasoline tax 10 0 -2 variables,the same intuition holds.If we have three variables,then each constraint corresponds to a half- space in three-dimensional space. The intersection of these half-spaces forms the feasible region. minimize x1+X2十 X3 十 X4 subject to -2x1+8x2+ 0x3+ 10x4 ≥ 50 5x1+2x2+0x3 0x4 100 3x1-5x2+10x3 2X4 25 X1,X2,X3,X4 0Although we cannot easily graph linear programs with more than two variables, the same intuition holds. If we have three variables, then each constraint corresponds to a half￾space in three-dimensional space. The intersection of these half-spaces forms the feasible region