document.write( "Question 83917: Would someone show me step by step how to figure this problem. Please. Thank You.\r
\n" ); document.write( "\n" ); document.write( "The profit on a watch is given by P=x^2-13x-80, where x is the number of watches sold per day. How many watches were sold on a day when there was a $50 loss?
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Algebra.Com's Answer #60411 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
If there was a $50 loss, then \"P=-50\"\r
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\n" ); document.write( "\n" ); document.write( "\"-50=x%5E2-13x-80\" Plug in \"P=-50\". Now lets solve for x\r
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\n" ); document.write( "\n" ); document.write( "\"0=x%5E2-13x-80%2B50\" Add 50 to both sides\r
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\n" ); document.write( "\n" ); document.write( "\"0=x%5E2-13x-30\" Combine like terms\r
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\n" ); document.write( "\n" ); document.write( "\"0=%28x%2B2%29%28x-15%29\" Factor the expression\r
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\n" ); document.write( "\n" ); document.write( "\"x%2B2=0\" or \"x-15=0\" Set each factor equal to zero\r
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\n" ); document.write( "\n" ); document.write( "\"x=-2\" or \"x=15\" Solve for x in each case\r
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\n" ); document.write( "\n" ); document.write( "Since you cannot sell -2 watches, the number of watches sold was 15
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