document.write( "Question 860815: Find the probability that the vertex of the graph y=x^2-8x+c is above the x-axis if the c is a randomly selected integer from 1 to 20. \r
\n" ); document.write( "\n" ); document.write( "I've tried so many things and I just can't figure out how to even set up the problem. I'm just so confused and could really use some help.
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Algebra.Com's Answer #518647 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
 
\n" ); document.write( "Hi,
\n" ); document.write( "y=x^2-8x+c
\n" ); document.write( "y = (x-4)^2 - 16 + c
\n" ); document.write( "To be above the y axis, c > 16
\n" ); document.write( "P(17 0r 18 0r 19 0r 20) =\"+1%2F20+%2B+1%2F20+%2B+1%2F20+%2B+1%2F20+=+4%2F20+=+1%2F5\"
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