document.write( "Question 1151765: a family drove to a resort at an avrage speed of 3o mph and later returned over the same road at an average speed of 45 mph. find the distance to the resort if the total driving time was 8 hours \n" ); document.write( "

Algebra.Com's Answer #773611 by ikleyn(52851) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "Let \"d\" be the distance to the resort.\r\n" );
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document.write( "Then the driving time of 8 hours is the sum of the driving time to there,    hours, and the driving time back,    hours:\r\n" );
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document.write( "     +  = 8  hours.    (1)\r\n" );
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document.write( "It is your basic equation to find the unknown value \"d\".\r\n" );
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document.write( "To solve it, multiply both sides of the equation by 90.  You will get\r\n" );
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document.write( "    3d + 2d = 8*90\r\n" );
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document.write( "    5d      = 720\r\n" );
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document.write( "     d      = 720/5 = 144.\r\n" );
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document.write( "ANSWER.  One way distance is 144 miles.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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\n" ); document.write( "\n" ); document.write( "The solution is based on using the \"time\" equation (1).\r
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\n" ); document.write( "\n" ); document.write( "Using \"time\" equation is the STANDARD method of solving such problems.\r
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\n" ); document.write( "\n" ); document.write( "It is simple, logical, straightforward, economic and robust (works in standard way for any input data). \r
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\n" ); document.write( "\n" ); document.write( "Going in this way, you will never make a mistake - the logic of the method
\n" ); document.write( "prevents you of making mistakes.\r
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\n" ); document.write( "\n" ); document.write( "From this lesson, learn on how to write, how to use and how to solve a \"time\" equation.\r
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\n" ); document.write( "\n" ); document.write( "To see many other similar solved problems, look into the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Had a car move faster it would arrive sooner\r
\n" ); document.write( "\n" ); document.write( "    - How far do you live from school? \r
\n" ); document.write( "\n" ); document.write( "    - Earthquake waves \r
\n" ); document.write( "\n" ); document.write( "    - Time equation: HOW TO use, HOW TO write and HOW TO solve it \r
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\n" ); document.write( "\n" ); document.write( "As I do it in many other cases, I will ignore the notice from @greenestamps.\r
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\n" ); document.write( "\n" ); document.write( "The method of discussion, which he uses, is well known trick.\r
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\n" ); document.write( "\n" ); document.write( "It is called DEMAGOGY.\r
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