Expression 4: 285 "x" plus 700 "y" equals 4407 left brace, negative .6 less than or equal to "x" less than or equal to 2.2 , right brace285x+700y=4407−.6≤x≤2.2
4
Expression 5: 4 "x" plus 3 "y" equals 25 left brace, 2.2 less than or equal to "x" less than or equal to 4 , right brace4x+3y=252.2≤x≤4
5
Expression 6: "x" equals 4 left brace, 0 less than or equal to "y" less than or equal to 3 , right bracex=40≤y≤3
6
Expression 7: "y" equals 0 left brace, 0 less than or equal to "x" less than or equal to 4 , right bracey=00≤x≤4