X: 4 units of a and 5 units of b per hour
y: 3 units of a and 10 units of b per hour
cost to run machine x: $22/hr
cost to run machine y: $25/hr
4x + 3y = 90
5x + 10y 2 150
x20
y 20
x=number of hours machine x runs
y=number of hours machine y runs
the objective function is c=
y.