document.write( "Question 966879: Find two numbers to some is 0.71 and whose product is 0.1218
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document.write( "Find two numbers whose difference is .03 and who some is .79
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document.write( "Find two numbers who some is 1.33 and whose difference is .09 Thank you very much \n" );
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Algebra.Com's Answer #590966 by rothauserc(4718)![]() ![]() You can put this solution on YOUR website! A) Find two numbers to some is 0.71 and whose product is 0.1218 \n" ); document.write( "x + y = 0.71 \n" ); document.write( "xy = 0.1218 \n" ); document.write( "solve second equation for x \n" ); document.write( "x = 0.1218 / y \n" ); document.write( "substitute for x in first equation \n" ); document.write( "(0.1218 / y) + y = 0.71 \n" ); document.write( "multiply both sides of = by y \n" ); document.write( "0.1218 +y^2 = 0.71y \n" ); document.write( "y^2 -0.71y + 0.1218 = 0 \n" ); document.write( "factor the polynomial \n" ); document.write( "(y -0.42) * (y -0.29) = 0 \n" ); document.write( "there are two solution sets \n" ); document.write( "x = 0.29, y = 0.42 \n" ); document.write( "x = 0.42, y = 0.29 \n" ); document.write( "************************************************************** \n" ); document.write( "B) Find two numbers whose difference is .03 and who some is .79 \n" ); document.write( "x - y = 0.03 \n" ); document.write( "x + y = 0.79 \n" ); document.write( "solve frist equation for x \n" ); document.write( "x = y +0.03 \n" ); document.write( "substitute for x in second equation \n" ); document.write( "y +0.03 +y = 0.79 \n" ); document.write( "2y = 0.76 \n" ); document.write( "y = 0.38 \n" ); document.write( "x = 0.41, y = 0.38 \n" ); document.write( "**************************************************************** \n" ); document.write( "C) Find two numbers who some is 1.33 and whose difference is .09 \n" ); document.write( "x + y = 1.33 \n" ); document.write( "x - y = 0.09 \n" ); document.write( "solve second equation for x \n" ); document.write( "x = y +0.09 \n" ); document.write( "substitute for x in first equation \n" ); document.write( "y +0.09 +y = 1.33 \n" ); document.write( "2y = 1.24 \n" ); document.write( "y = 0.62 \n" ); document.write( "x = 0.71, y = 0.62 \n" ); document.write( " \n" ); document.write( " |