document.write( "Question 60921This question is from textbook
\n" ); document.write( ": i have to find the coordinates of the vertex of y=3.5x^+2x-8 \n" ); document.write( "
Algebra.Com's Answer #41879 by pvaka(23)\"\" \"About 
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i have to find the coordinates of the vertex of y=3.5x^+2x-8\r
\n" ); document.write( "\n" ); document.write( "I assume that 3.5x^2, correct?\r
\n" ); document.write( "\n" ); document.write( "To find the coordinates for the vertex, we have to first find the \"x\" coordinate using the formula x = -b/2a and then substitutes that x value for x in the equation and sovle for \"y\".
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\n" ); document.write( "y(x)=ax^2 + bx + c ===>y = 3.5x^2+2x-8
\n" ); document.write( "a= 3.5,b=2,c=-8
\n" ); document.write( "x=-b/2a==>-(2)/2(3.5)= (-2)/7
\n" ); document.write( "x=-2/7
\n" ); document.write( "So we have the x coordinate of negative 2/7. Let's find the y value.
\n" ); document.write( "y(-2/7)=3.5(-2/7)^2+2(-2/7)-8
\n" ); document.write( "y(-2/7)=-58/7
\n" ); document.write( "y=-58/7
\n" ); document.write( "Solution: Vertex coordinate is (-2/7,-58/7)
\n" ); document.write( "And of course we know that the parabola opens upward because \"a\" or 3.5 is greater than 0.\r
\n" ); document.write( "\n" ); document.write( "Hope this help.
\n" ); document.write( "pvaka\r
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