document.write( "Question 933584: In history class, the girl to boy ratio is 9 to 8.\r
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document.write( "If there are a total of 68 students, how many girls are there? \n" );
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Algebra.Com's Answer #566959 by ptaylor(2198)![]() ![]() You can put this solution on YOUR website! Let x=number of girls \n" ); document.write( "Girl to boy ratio is 9 to 8 means that for every (9+8=17) students 9/17 are girls. So \n" ); document.write( "(9/17)*68=36--number of girls \n" ); document.write( "Another way: \n" ); document.write( "9:8=x:(68-x) or \n" ); document.write( "(9/8)=x/(68-x) Cross-multiply \n" ); document.write( "9(68-x)=8x \n" ); document.write( "612-9x=8x \n" ); document.write( "17x=612 \n" ); document.write( "x=36--number of girls\r \n" ); document.write( "\n" ); document.write( "Did this help?--ptaylor\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |