Question

I need help ASAP!


How would I graph the feasible region for each set of constraints?
1.) {x+y<(or equal to) 9
2x-<(or equal to) 5
x>(or equal to)0, y>(or equal to)0

2.) {3x+4y<(or equal to) 20
y-x<(or equal to) 3
x>(or equal to)0, y>(or equal to)0

3.) {x+2y<(or equal to)16
3x-4y<(or equal to)12
x>(or equal to)0, y>(or equal to)