document.write( "Question 286362: If (x − 7)(y + 7) < 0, then which of the following must be true?\r
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Algebra.Com's Answer #207735 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
If \"%28x+-+7%29%28y+%2B+7%29+%3C+0\", then either \"x-7%3C0\" (ie \"x-7\" is negative) or \"y%2B7%3C0\" (ie \"y%2B7\" is negative), but not both. If they are both negative, then the result is positive. Also, if they're both positive, then the product is positive.\r
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\n" ); document.write( "\n" ); document.write( "So if \"x-7%3C0\", then \"x%3C7\" which is choice C)\r
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\n" ); document.write( "\n" ); document.write( "and if \"y%2B7%3C0\", then \"y%3C-7\" which is is choice B)\r
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\n" ); document.write( "\n" ); document.write( "So the answers are B and C (if you're allowed multiple answers), but not at the same time. If you aren't allowed multiple answers, then there's a typo somewhere.
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