document.write( "Question 289919: It takes two laser printers working together 12 minutes to complete a 580 page print job ,if each printer is printing this job alone, the first laser printer takes 10 minutes longer than the second printer . How long does it take each printer to complete the print job alone? What is the speed of each printer. \r
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document.write( "I don't even know where to begin with this. Someone please help me step by step?
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document.write( "Thanks! \n" );
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Algebra.Com's Answer #209895 by Grinnell(63)![]() ![]() ![]() You can put this solution on YOUR website! Pack a Lunch! \n" ); document.write( "This is basically a CLASSIC RATE WORK PROBLEM. \n" ); document.write( "Then at the end we have DIVISION to deal with. \n" ); document.write( "Breathe slowly...we WILL get thru this!!! \n" ); document.write( "Let x be the faster machine. \n" ); document.write( "Let x+10 be the slower machine. \n" ); document.write( "STOP--UNDERSTAND THAT WITH RATE WORK PROBLEMS FAST AND SLOW PARADIGM MEANS ADDING TO SLOWER. E.G. IT TAKES ME 20 MINUTES TO DO SOMETHING IT TAKES YOU 20 + 10 MINUTES TO DO (30 MINUTES) WE ADDED MINUTES TO THE SLOWER TIME. YOU MUST UNDERSTAND THIS IN WORK PROBLEMS.\r \n" ); document.write( "\n" ); document.write( "Now we are concerned about the Job. NOT THE NATURE OF THE JOB OR THE NUMBER OF PAGES INVOLVED--JUST THAT 'A' JOB IS BEING COMPLETED IN 12 MINUTES. THIS IS WHY WE CAN NOW SAY... \n" ); document.write( "1/X+1/X+10=1/12 STOP HERE AND REVIEW YOUR SECTION IN YOUR TEXT ABOUT CLASSIC RATE WORK PROBLEMS! \n" ); document.write( "MULTIPLY THRU BY (X)(X+10)(12) WE GET 12X+120+12X=X^2+10X DO THE 'LIKE TERMS' WE GET... \n" ); document.write( "X^2-14x-120=0 \n" ); document.write( "(x-20)(x+6)=0 (x cannot be negative because of the nature of the problem, therefore x is 20! \n" ); document.write( "The faster machine takes 20 minutes to complete the job alone. \n" ); document.write( "The slower machine takes 30 minutes to complete the job alone. (1/20+1/30=1/12--You do the check.) \n" ); document.write( "N O W WE GET TO THE ACTUAL JOB. 580 PAGES! \n" ); document.write( "580/20=29 SO THE FASTER MACHINE COMPLETES 29 PAGES PER MINUTE \n" ); document.write( "WHILE THE SLOWER MACHINE (580/30) COMPLETES 19.3 PAGES PER MINUTE. Thanks for the question. Have wonderful afternoon:) \n" ); document.write( " |