Answer:
Let x represents acres of corn to be planted.
Let y represents acres of soybeans to be planted.
A farmer has a 320 acre farm on which she plants two crops. We get;
[tex]x+y\leq 320[/tex]
Other equations as per scenario becomes:
[tex]x\geq 0[/tex]
[tex]y\geq 0[/tex]
[tex]50x+100y\leq 20000[/tex]
[tex]100x+40y\leq 19200[/tex]
We have to find the profit. So let the profit be p. We can give this by:
[tex]p(x,y)=60x+90y[/tex]
When we graph these functions, we get the following.
(0,200) putting these in [tex]p(x,y)=60x+90y[/tex] we get profit as $1800
(140,130) , we get $20,100
(192,0) we get $11520
In the graph, we have points (240,180) but this is not possible as [tex]x+y\leq 320[/tex] so, we have (140,130) to get the maximum profit.