Question
The total mass of Jack and Tammy is 8415 kg. Jack weighs 4137 kg. 
  1. What is Tammy's mass?
  2. How much heavier than Jack is Tammy?
4 m
(a)

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(b)

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The total mass of Jack and Tammy is 8415 kg. Jack weighs 4137 kg. 
  1. What is Tammy's mass?
  2. How much heavier than Jack is Tammy?