22) && ($week < 34)) || ($week > 45))//approximately half the weeks of the year { print $phraseOne ; } else{ print $phraseTwo; } } function andToggler() { $phraseOne ="& "; $phraseTwo =" and "; // 00 -- 53 if(($week < 3) || (($week > 15) && ($week < 31)) || ($week > 33))//approximately half the weeks of the year { print $phraseOne ; } else{ print $phraseTwo; } } function aTheToggler() { $phraseOne =" a "; $phraseTwo =" the "; // 00 -- 53 if(($week < 20) || (($week > 25) && ($week < 44)) || ($week > 49))//approximately half the weeks of the year { print $phraseOne ; } else{ print $phraseTwo; } } ?>
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Interactive System of Linear Inequalities

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Systems of linear equations with 3 variables
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