# Need to find and correct error in the functiony=-9.5x^{2}-47.5x+63as shown.x=frac{-b}{2a*x}=frac{-47.5}{2(-9.5)*x}=frac{-47.5}{-19*x}=-(-2.5)x=2.5y=-9.5(2.5)^{2}-47.5(2.5)+63y=59.375-118.75+63y=-115.125

Need to find and correct error in the function $y=-9.5{x}^{2}-47.5x+63$ as shown.
$x=\frac{-b}{2a×x}=\frac{-47.5}{2\left(-9.5\right)×x}=\frac{-47.5}{-19×x}=-\left(-2.5\right)x=2.5$
$y=-9.5\left(2.5{\right)}^{2}-47.5\left(2.5\right)+63y=59.375-118.75+63y=-115.125$

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Faiza Fuller

Identify the coefficients a,b, and c: $a=-9.5$, $b=-47.5$, $c=63$. substituted $b=47.5$ in the formula for finding the vertex.
Let's correct that error and find the correct solution.
$x=\frac{-b}{2a}$
$x=-\frac{47.5}{2×\left(-9.5\right)}$
$x=-\frac{-47.5}{-19}$
$x=-2.5$
$y=-9.5×\left(-2.5{\right)}^{2}-47.5×\left(-2.5\right)+63$
$y=-59.375+118.75+63$
$y=122.375$ The vertex is (-2.5, 122.375).