Question
Brandon has a mass of 5z kg. David is 3 kg heavier than Brandon. The mass of Marion is thrice the total mass of Brandon and David.
  1. Find the total mass of the 3 children in terms of z.
  2. If z = 3, find the average mass of the 3 children.
2 m
(a)

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(b)

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Brandon has a mass of 5z kg. David is 3 kg heavier than Brandon. The mass of Marion is thrice the total mass of Brandon and David.
  1. Find the total mass of the 3 children in terms of z.
  2. If z = 3, find the average mass of the 3 children.