document.write( "Question 715744: The height, y, of a ball tossed into the air can be represented by the equation $\"+y=+-x%5E2%2B10x%2B3+\"$ , where x is the elapsed time. What is the equation of the axis of symmetry of this parabola? \n" ); document.write( "

Algebra.Com's Answer #440231 by lwsshak3(11628) $\"\"$ $\"About$

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The height, y, of a ball tossed into the air can be represented by the equation $\"+y=+-x%5E2%2B10x%2B3+\"$ , where x is the elapsed time. What is the equation of the axis of symmetry of this parabola?
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\n" ); document.write( "Vertex form of equation for a parabola that opens upward: y=A(x-h)^2+k, (h,k)=(x,y) coordinates of the vertex
\n" ); document.write( "complete the square
\n" ); document.write( "y= -(x^2-10x+25)+25+3
\n" ); document.write( "y=-(x-5)^2+28
\n" ); document.write( "vertex(5,28)
\n" ); document.write( "axis of symmetry: x=5\r
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