document.write( "Question 175287: Sheila has a picture frame that measures 20cm by 30cm. If she puts a mat inside the frame that decreases the picture area by 264cm2, how wide is the mat? \n" ); document.write( "
Algebra.Com's Answer #130768 by checkley75(3666)![]() ![]() ![]() You can put this solution on YOUR website! 20*30=600cm^2 is the picture area. \n" ); document.write( "600-264=336 \n" ); document.write( "2x*3x=336 \n" ); document.write( "6x^2=336 \n" ); document.write( "x^2=336/6 \n" ); document.write( "x^2=56 \n" ); document.write( "x=sqrt56 \n" ); document.write( "x=7.48 \n" ); document.write( "2*7.48=14.96 for one dimention. \n" ); document.write( "3*7.48=22.44 for the other dimention. \n" ); document.write( "Proof: \n" ); document.write( "14.96*22.44=336 \n" ); document.write( "336~336 \n" ); document.write( " |