document.write( "Question 1126889: Find values for h and k so that the system has infinitely many solutions. Write answers as integers or fractions in lowest terms. \r
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document.write( "−8x − 6y = h
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document.write( "12x + ky = 24\r
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Algebra.Com's Answer #743213 by rothauserc(4718)![]() ![]() You can put this solution on YOUR website! Since we have linear equations(lines), we want them to have the same slope and y intercept \n" ); document.write( ": \n" ); document.write( "equation 1 \n" ); document.write( ": \n" ); document.write( "−8x − 6y = h \n" ); document.write( ": \n" ); document.write( "-6y = 8x +h \n" ); document.write( ": \n" ); document.write( "y = -8x/6 -h/6 \n" ); document.write( ": \n" ); document.write( "y = -4x/3 -h/6 \n" ); document.write( ": \n" ); document.write( "equation 2 \n" ); document.write( ": \n" ); document.write( "12x + ky = 24 \n" ); document.write( ": \n" ); document.write( "ky = -12x +24 \n" ); document.write( ": \n" ); document.write( "y = -12x/k +24/k \n" ); document.write( ": \n" ); document.write( "the slopes must be equal, therefore \n" ); document.write( ": \n" ); document.write( "-4/3 = -12/k \n" ); document.write( ": \n" ); document.write( "cross multiply the fractions \n" ); document.write( ": \n" ); document.write( "-4k = -36 \n" ); document.write( ": \n" ); document.write( "k = 9 \n" ); document.write( ": \n" ); document.write( "y intercepts must be equal \n" ); document.write( ": \n" ); document.write( "-h/6 = 24/k \n" ); document.write( ": \n" ); document.write( "we know k = 9 \n" ); document.write( ": \n" ); document.write( "-h/6 = 24/9 = 8/3 \n" ); document.write( ": \n" ); document.write( "-3h = 48 \n" ); document.write( ": \n" ); document.write( "h = -16 \n" ); document.write( ": \n" ); document.write( "******************************************* \n" ); document.write( "h = -16 and k = 9 \n" ); document.write( ": \n" ); document.write( "check the answer \n" ); document.write( ": \n" ); document.write( "equation 1 \n" ); document.write( ": \n" ); document.write( "-8x -6y = -16 \n" ); document.write( ": \n" ); document.write( "-4x -3y = -8 \n" ); document.write( ": \n" ); document.write( "4x +3y = 8 \n" ); document.write( ": \n" ); document.write( "equation 2 \n" ); document.write( ": \n" ); document.write( "12x + 9y = 24 \n" ); document.write( ": \n" ); document.write( "4x +3y = 8 \n" ); document.write( ": \n" ); document.write( "answer checks \n" ); document.write( "******************************************** \n" ); document.write( ": \n" ); document.write( " |