Question
One file costs $i while one colouring book costs 80¢ less than the file.
  1. What is the cost of 4 files and 1 colouring book? Express your answer in terms of i in its simplest form. 
  2. Albert wants to buy 4 files and 1 colouring book but is short of 30 cents. If the colouring book costs $1.80, how much money does Albert have in dollars?
3 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

One file costs $i while one colouring book costs 80¢ less than the file.
  1. What is the cost of 4 files and 1 colouring book? Express your answer in terms of i in its simplest form. 
  2. Albert wants to buy 4 files and 1 colouring book but is short of 30 cents. If the colouring book costs $1.80, how much money does Albert have in dollars?