Question
Risa bought 2 kg of durians at $a per kg and 4 kg of lemons at $2a per kg.
  1. Find the amount that she paid for the fruits in terms of a.
  2. If a = 7, how much change did Mrs Risa receive if she paid the fruit seller with a $100 note?
3 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

Risa bought 2 kg of durians at $a per kg and 4 kg of lemons at $2a per kg.
  1. Find the amount that she paid for the fruits in terms of a.
  2. If a = 7, how much change did Mrs Risa receive if she paid the fruit seller with a $100 note?