document.write( "Question 602129: Please show all work. Thanks in advance.\r
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document.write( "Solving using a system of two equations and two unknowns. \r
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document.write( "A computer parts company wants to make a rectangle memory board that has a perimeter of 34cm and a diagonally of length 13cm. Find the dimensions of a board. Consider the length to be the longer side.\r
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Algebra.Com's Answer #380136 by mananth(16949) You can put this solution on YOUR website! le length be x \n" ); document.write( "width be y\r \n" ); document.write( "\n" ); document.write( "perimeter = 2(x+y) = 34 \n" ); document.write( "/2 \n" ); document.write( "x+y =17\r \n" ); document.write( "\n" ); document.write( "By Pythagoras theorem \n" ); document.write( "The doagonal forms a right triangle with the sides\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "add 2xy \r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "17^2=169+2xy\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "120=2xy \n" ); document.write( "xy = 60 \n" ); document.write( "x= 60/y\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x+y =17 \n" ); document.write( "60/y + y = 17 \n" ); document.write( "60+y^2=17y\r \n" ); document.write( "\n" ); document.write( "y^2-17y+60=0 \n" ); document.write( "y^2-12y-5y+60=0 \n" ); document.write( "y(y-12)-5(y-12)=0 \n" ); document.write( "(y-12)(y-5)=0 \n" ); document.write( "y= 12cm OR 5cm\r \n" ); document.write( "\n" ); document.write( "The dimensions are 12cm length & 5 cm width\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |