document.write( "Question 188303: The profit on a watch is given by P = x2 – 13x – 80 and where x is the number of watches sold per day. How many watches were sold on a day when there was a $50 loss? \n" ); document.write( "

Algebra.Com's Answer #141145 by Mathtut(3670) $\"\"$ $\"About$

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$\"-50=x%5E2-13x-80\"$
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\n" ); document.write( " $\"x%5E2-13x-30=0\"$
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\n" ); document.write( " $\"%28x-15%29%28x%2B2%29=0\"$
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\n" ); document.write( "so x=15 and -2....since you cant sell a negative number of watches
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\n" ); document.write( "x=15 watches \n" ); document.write( "

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