\r\n" );
document.write( "\r\n" );
document.write( "Find the midpoint (\"half way\" point) from 66 to 74\r\n" );
document.write( "by averaging them: 
= 
= 70\r\n" );
document.write( "\r\n" );
document.write( "So 70 is half way between 66 and 74.\r\n" );
document.write( "\r\n" );
document.write( "70 inches is 4 inches TALLer than 66 inches and 4 inches \r\n" );
document.write( "SHORTer than 74 inches.\r\n" );
document.write( "\r\n" );
document.write( "Let's look at the shortest height which they'll accept, which is\r\n" );
document.write( "66. If you subtract 70 from that, 66-70, you get -4.\r\n" );
document.write( "\r\n" );
document.write( "Now let's look at the tallest height which they'll accept, which is\r\n" );
document.write( "74. If you subtract 70 from that, 74-70, you get +4.\r\n" );
document.write( "\r\n" );
document.write( "Now notice that both -4 and +4 have the same absolute value. \r\n" );
document.write( "So we want to write an inequality that will say that \r\n" );
document.write( "when we subtract the middle value 70 from it, we will get\r\n" );
document.write( "a number whose absolute value is no more than 4, that is,\r\n" );
document.write( "LESS THAN OR EQUAL 4. \r\n" );
document.write( "\r\n" );
document.write( "Let x = the height of a person. Then when we subtact 70\r\n" );
document.write( "from it, we get x-70, then we put it in absolute value bars like\r\n" );
document.write( "this, |x-70| and then we say that this is less than or equal to 4,\r\n" );
document.write( "so we write:\r\n" );
document.write( "\r\n" );
document.write( " |x - 70| ≦ 4\r\n" );
document.write( "\r\n" );
document.write( "That's the answer.\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" );
document.write( "![\"\"](\"/images/stars/stars-13.gif\")
