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What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52