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

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

2021-01-07
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.
$$x=\frac{-b}{2a}$$
$$x=-\frac{47.5}{2*(-9.5)}$$
$$x=-\frac{-47.5}{-19}$$
$$x=-2.5$$
$$y=-9.5*(-2.5)^{2}-47.5*(-2.5)+63$$
$$y=-59.375+118.75+63$$
$$y=122.375$$ The vertex is (-2.5, 122.375).

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