Answer:
Fourth option
Step-by-step explanation:
When graphing the given inequalities you will get a region like the one shown in the attached image. This region is delimited by 4 straight
[tex]x = 0\\\\y = 0\\\\9x + 6y = 400\\\\7x + 10y = 400[/tex]
The points indicated at the ends of the region are the maximum possible values of x and y.
We must test these points in the objective function [tex]P = 2x + 2.5y[/tex] and see which point maximizes the value of P.
Remember that the boundaries of the region are not included.
We can prove the point x = 0 and y = 39 because (0,4) is not included in the region.
[tex]P = 2(0) + 2.5(39) = 97.5[/tex]
Now we test the point x = 33 and y = 16
[tex]P = 2(33) + 2.5(16) = 106[/tex]
Now we test the point x = 44 and y = 0
[tex]P = 2(44) + 2.5(0) = 88[/tex]
Finally the optimal value is:
x = 33 oz
y = 16 oz
With a gain of $106