Use graphical methods to solve the following linear programming problem. Maximize: z = 3x + y subject to: x-y≤6 3x + 5y ≤45 x ≥ 0, y 20

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Q: : Find the Laplace transform F(s) = {f(t)} of the function f(t) = (8-t) [U(t-4) - U(t-8)].

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