document.write( "Question 455473: 1. Jane was vacuuming the narrow hallway in her house. She went 5 feet forward in the first 4 seconds, then went 3 feet backwards in the next 4 seconds. She continued to do this, forward 5 feet in 4 seconds and backwards 3 feet in 4 seconds. If she continues in this way, how many seconds will it take her to reach the end of her hallway, which is 15 feet long? \n" ); document.write( "
Algebra.Com's Answer #312706 by Edwin McCravy(20056)\"\" \"About 
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1. Jane was vacuuming the narrow hallway in her house. She went 5 feet forward in the first 4 seconds, then went 3 feet backwards in the next 4 seconds. She continued to do this, forward 5 feet in 4 seconds and backwards 3 feet in 4 seconds. If she continues in this way, how many seconds will it take her to reach the end of her hallway, which is 15 feet long?
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document.write( "Pretend that the points in the hallway are marked off in\r\n" );
document.write( "feet like this: \r\n" );
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document.write( " o--o--o--o--o--o--o--o--o--o--o--o--o--o--o--o\r\n" );
document.write( " 0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15\r\n" );
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document.write( "She starts at 0.\r\n" );
document.write( "When  4 seconds have lapsed she is at  5.\r\n" );
document.write( "When  8 seconds have lapsed she is at  2.\r\n" );
document.write( "When 12 seconds have lapsed she is at  7.\r\n" );
document.write( "When 16 seconds have lapsed she is at  4.\r\n" );
document.write( "When 20 seconds have lapsed she is at  9.\r\n" );
document.write( "When 24 seconds have lapsed she is at  6. \r\n" );
document.write( "When 28 seconds have lapsed she is at 11.\r\n" );
document.write( "When 32 seconds have lapsed she is at  8.\r\n" );
document.write( "When 36 seconds have lapsed she is at 13.\r\n" );
document.write( "When 40 seconds have lapsed she is at 10.\r\n" );
document.write( "When 44 seconds have lapsed she is at 15.\r\n" );
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document.write( "So she reaches the end of the hallway in 44 seconds.\r\n" );
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document.write( "Edwin
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