Answer:
Extracting out that inner right angle.
Hypotenuse = 8
Height = h
Adjacent :

Height, h :

Its just a matter of subbing...but keep in mind, for it to be a solution, it has to satisfy all 3 inequalities
x - y > = -4
2x - y < = 5
2y + x > 1
solutions are : (-1,3) and (3,5)
So, we need to add.
45 + 30 = 85.
$0.85 is your answer.
Glad I could help, and good luck!
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