document.write( "Question 290378: Can someone help me solve this problem? I am having a hard time with it, can you explain the steps?\r
\n" ); document.write( "\n" ); document.write( " Assume the profit earned by an artist in any given year is governed by the function P(n) = -2n^2 + 80n – 30 where n represents the number of paintings sold and P (in thousands of dollars) represents the profit. How many paintings should be sold to create a maximum profit? What is the maximum profit? \r
\n" ); document.write( "\n" ); document.write( " Thank you, Cynthia :)
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Algebra.Com's Answer #210139 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
You want the vertex.
\n" ); document.write( "The x component or n component will be the number of paints with maximum profit P(n)
\n" ); document.write( "what is the x component of the vertex -b/2a
\n" ); document.write( "-80/2*-2=80/4=20
\n" ); document.write( "plug 20 in for n and solve and that will give you the max of the parabola which should come out to 770\r
\n" ); document.write( "\n" ); document.write( "Everyone here wants help.
\n" ); document.write( "I generally avoid the problems with begging.
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