document.write( "Question 787298: I need help. I know that this has to do with time, Distance and rate, but I am having a problem setting up this problem and where do I put the X. Shannon drove 45MPH to her sister vanessas house, she stayed for lunch which was 1 1/2 hours, then shannon drove home at 55MPH. The whole trip including lunch was 4 hours. How far does shannon live from vanessa?
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Algebra.Com's Answer #478164 by josgarithmetic(39617)![]() ![]() ![]() You can put this solution on YOUR website! You just account for time and rely on movement using rate*time=distance. \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "divide both sides by r and have: \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The time traveling was \n" ); document.write( "Times for going and returning are unknowns, x and y.\r \n" ); document.write( "\n" ); document.write( "45*x+55*y= distance that you do not know, say d. \n" ); document.write( " \n" ); document.write( "and \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So far, your problem is incomplete. You have THREE variables but only TWO equations. \n" ); document.write( " |