Mathematics, 14.07.2019 14:00 nyceastcoast

The graph of the quadratic $y = ax^2 + bx + c$ is a parabola that passes through the points $(-1,7)$, $(5,7)$, and $(6,10)$. what is the $x$-coordinate of the vertex of the parabola?

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The graph of the quadratic $y = ax^2 + bx + c$ is a parabola that passes through the points $(-1,7)$...