document.write( "Question 174170: A poster is 25cm taller than it is wide. It is mounted on a piece of cardboard so that there is a 5cm border on all sides. If the area of the border alone is 1350cm^2, what are the dimensions of the poster? \n" ); document.write( "
Algebra.Com's Answer #129139 by Mathtut(3670)![]() ![]() ![]() You can put this solution on YOUR website! lets call the width x and the length y=x+25 of the poster......the cardboard area minus the poster area would give us the area of the border(which is 1350).\r \n" ); document.write( "\n" ); document.write( "the cardboard area would be (x+5)(x+25+5)=(x+5)(x+30)= \n" ); document.write( "\n" ); document.write( "the area of the poster is x(x+25)= \n" ); document.write( ": \n" ); document.write( "so \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |