document.write( "Question 1172541: The weekly profit of your group’s home-made brownies in a box is modeled by the equation profit, P = - x2 + 120x - 28. The weekly profit P is dependent on the number of boxes of brownies x sold. If the break-even point is when P = 0, then how many boxes of brownies must your group sell in a week in order to break-even your profit? \n" ); document.write( "

Algebra.Com's Answer #797609 by Solver92311(821) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "The graph of your profit function is a concave down parabola, so the maximum profit is at the vertex of the parabola. The general equation for a parabola is:\r
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\n" ); document.write( "\n" ); document.write( "The value of the independent variable at the vertex of the general parabola is

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\n" ); document.write( "\n" ); document.write( "Determine, by inspection, the values of

and

that are specific to your question and then calculate

to find your answer.\r
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\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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\n" ); document.write( "\n" ); document.write( "From
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