Kelly sank down into a seat at the back of the subway car, glad for the chance to rest a bit after a hectic day. Derrick, her 2-year-old son, squirmed on her lap as the ride began. He soon settled down, however, apparently fascinated with their surroundings, and before long she was dozing. Mistake! Suddenly the child leaped from her lap and charged down the aisle, giggling at the trick he’d played on his mom. By the time Kelly was fully awake and had started running after him, he was 6 yards ahead of her. Relative to the track outside, Derrick was moving at 33 mph, and Kelly was moving at 35 mph (the train’s speed was 30 mph). How long did it take her to catch Derrick? How far from her seat were they when she caught him?

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter7: Systems Of Equations And Inequalities
Section7.2: Systems Of Linear Equations: Three Variables
Problem 61SE: Last year, at Haven's Pond Car Dealership, for a particular model of BMW, Jeep, and Toyota, one...
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Kelly sank down into a seat at the back of the subway car, glad for the chance to rest a bit after a hectic day. Derrick, her 2-year-old son, squirmed on her lap as the ride began. He soon settled down, however, apparently fascinated with their surroundings, and before long she was dozing. Mistake! Suddenly the child leaped from her lap and charged down the aisle, giggling at the trick he’d played on his mom. By the time Kelly was fully awake and had started running after him, he was 6 yards ahead of her. Relative to the track outside, Derrick was moving at 33 mph, and Kelly was moving at 35 mph (the train’s speed was 30 mph). How long did it take her to catch Derrick? How far from her seat were they when she caught him?

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