Another rly quick math question

<p>Parallel thread: <a href=“http://talk.collegeconfidential.com/sat-preparation/386324-psat-math-question-2005-alternate-exam.html[/url]”>http://talk.collegeconfidential.com/sat-preparation/386324-psat-math-question-2005-alternate-exam.html&lt;/a&gt;&lt;/p&gt;