Algebra

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Please check my answers.

Find the coordinates of the vertex for the parabola defined by the given quadratic function.

1.f(x) = (x - 4)2 - 4
-I got (4,-4)

Find the axis of symmetry of the parabola defined by the given quadratic function.

3.f(x) = (x + 2)2 + 7
-I got: x=-2

Find the range of the quadratic function.

5.f(x) = 7 - (x + 4)2
I got: (-inifinity,7]

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