document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=877711>Question 877711</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Select the x-coordinate of the vertex of the parabola defined by the function <BR>\n" );
document.write( "f(x) = -3x^2 + 5x + 5.\r<BR>\n" );
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document.write( "1. - 3/5<BR>\n" );
document.write( "2. 5<BR>\n" );
document.write( "3. 5/6<BR>\n" );
document.write( "4. -5/3\r<BR>\n" );
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document.write( "My answer is 5/6. Am I correct? </SPAN>\n" );
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document.write( "equation is -3x^2 + 5x + 5<BR>\n" );
document.write( "a = -3<BR>\n" );
document.write( "b = 5<BR>\n" );
document.write( "c = 5<BR>\n" );
document.write( "vertex is at x = -b/2a which is equal to -5/-6 which is equal to 5/6.<BR>\n" );
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