Hello, norwoodjay!
Graph the solution set of the system of inequalities.
28) .x + y .< .4
. . . .x 2y .> .6
The line x + y .= .4 has intercepts (4,0) and (0,4).
. . Plot the intercepts and draw the line.
. . Shade the region below the line.
The line x  2y .= .6 has intercepts (6,0) and (0,3).
. . Plot the intercepts and draw the line.
. . Shade the region below the line.
The graph looks like this: Code:
* 
4 o
 *
 *
 *
 * 4 *
   +     o   o      
 .*. 6
 .*:::::*.
 .*:::::::::::*.
3 o:::::::::::::::::*.
*::::::::::::::::::::::*
