document.write( "Question 1190460: If a certain machine produces x units every 15 minutes and another machine produces y units every 30 minutes, how many units will both machines working together produce in z hours?
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\n" ); document.write( "d) 60z(x/4+y/z)
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Algebra.Com's Answer #822094 by ikleyn(52794)\"\" \"About 
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\n" ); document.write( "If a certain machine produces x units every 15 minutes
\n" ); document.write( "and another machine produces y units every 30 minutes,
\n" ); document.write( "how many units will both machines working together produce in z hours?
\n" ); document.write( "a) z(15x+30y)
\n" ); document.write( "b) 2z(2x+y)
\n" ); document.write( "c) 60z(4x+2y)
\n" ); document.write( "d) 60z(x/4+y/z)
\n" ); document.write( "e) z/(4x+2y)
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document.write( "If a certain machine produces x units every 15 minutes, it produces 4x units every hour.\r\n" );
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document.write( "If   another machine produces y units every 30 minutes, it produces 2y units every hour.\r\n" );
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document.write( "Working together, both machines produce 4x+2y units every hour.\r\n" );
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document.write( "Working together, both machines produce z*(4x + 2y) = 2z*(2x+y) units in z hour.\r\n" );
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document.write( "ANSWER.  Option (b).\r\n" );
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