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what is the maximum profit using the vertex (0,60), (16,60), (30,25), (30,0) and the profit function p = 300c + 175?

what is the profit for each vertex? (4 points)
what is the maximum profit? (2 points)

Add, subtract, multiply, or divide as indicated. list any restrictions for the variable(s) and simplify the answers when possible. 1) x-2 / x+5 + 3x / 2x-1 2) x+6 / x-6 - x^2 / x+6 3) x+9 / x-4 + x+2 / x^2-11x+28 4) x / x^2-64 + 11 / 2x^2+11x-40 5) 5 / x + 11 / x-3 - x-4 / x^2+2x-15