document.write( "Question 187716: The width of a rectangle is fixed at 15cm. What lengths will make the permiter greater than 72 cm \n" ); document.write( "
Algebra.Com's Answer #140742 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! Let x = length \n" ); document.write( "width is given as 15 cm \n" ); document.write( ". \n" ); document.write( "Perimeter = 2(width + length) \n" ); document.write( ". \n" ); document.write( "72 < 2(15+x) \n" ); document.write( "dividing both sides by 2: \n" ); document.write( "36 < 15+x \n" ); document.write( "subtracting both sides by 15: \n" ); document.write( "21 < x \n" ); document.write( ". \n" ); document.write( "This says that the length has to be \"greater than\" 21 cm. \n" ); document.write( " \n" ); document.write( " |