document.write( "Question 809938: A woman on foot leaves a restaurant heading west at noon. Three hours later, a man on a bicycle leaves the resturant pedaling west at a rate of 12 miles per hour. at six o clock that evening, a woman on a scooter leaves the resturant driving west at a speed of 39 miles per hour. if the first woman was walking at a rate of 3 miles per hour, calculate the distances below.\r
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document.write( "A. how far from the resturant will the woman on foot be when the man on the bicycle reaches her?
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document.write( "B. How long will it take for the woman on the scooter to reach the woman on foot?
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document.write( "C. How far from the resturant will the man on the bicycle be when the woman on the scooter reaches him \n" );
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Algebra.Com's Answer #487862 by devipriya(2) ![]() You can put this solution on YOUR website! Part 1: \n" ); document.write( "Let the time be measured as 't'. \n" ); document.write( "The distance traveled when the woman meets the cyclist will be the same (d=d). The time for the cyclist, however, will be three hours lass than the time for the woman. \n" ); document.write( "Distance = Rate * Time \n" ); document.write( "For the woman, d = 3 * t. \n" ); document.write( "For the cyclist, d = 12 * (t - 3). \n" ); document.write( "The distance is equal, so: \n" ); document.write( "3t = 12(t-3), \n" ); document.write( "3t = 12t - 36, \n" ); document.write( "36 = 9t, \n" ); document.write( "t = 4. \n" ); document.write( "That's twelve miles. \r \n" ); document.write( "\n" ); document.write( "Part 2: \n" ); document.write( "Similar to part 1: \n" ); document.write( "d = 3t, \n" ); document.write( "d = 39(t - 6); \n" ); document.write( "so \n" ); document.write( "3t = 39(t - 6), \n" ); document.write( "3t = 39t - 234, \n" ); document.write( "234 = 36t, \n" ); document.write( "t = 6.5 (hours), that's 19.5 miles away when they meet! \r \n" ); document.write( "\n" ); document.write( "Part 3: \n" ); document.write( "The woman on foot no longer needs considered- the offset of the man-on-bicycle and woman-on-scooter is three hours: \n" ); document.write( "d = 12t, \n" ); document.write( "d = 39(t - 3); so, \n" ); document.write( "12t = 39(t - 3), \n" ); document.write( "12t = 39t - 117, \n" ); document.write( "117 = 27t, \n" ); document.write( "so the time for the man-on-bicycle is 4.333 hours (the woman-on-scooter takes 1.333 hours). \r \n" ); document.write( "\n" ); document.write( "Either way, the distance is 52 miles. \n" ); document.write( " |