A farmer plants white rice and brown rice on 10 acres of land.He must use pesticide on all 10 acres and he has 18 liters of pesticide to use.White rice requires 2 liters of pesticide per acre and brown rice requires 1 liter of pesticide per acre.If he can earn $5000 for each acre of white rice and $3000 for each acre of brown rice, how many acres of each should he plant to maximize his earnings?What are his maximum earnings?

Let x represent the white rice.

Let y represent the brown rice.

Constraints:

2x+y (less than or equal to)18

x+y(less than or equal to)10

x((greater than or equal to)0

y(greater than or equal to)0