Question
One file costs $k while one story book costs 60¢ less than the file.
  1. What is the cost of 3 files and 1 story book? Express your answer in terms of k in its simplest form. 
  2. Riordan wants to buy 3 files and 1 story book but is short of 30 cents. If the story book costs $1.60, how much money does Riordan 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 $k while one story book costs 60¢ less than the file.
  1. What is the cost of 3 files and 1 story book? Express your answer in terms of k in its simplest form. 
  2. Riordan wants to buy 3 files and 1 story book but is short of 30 cents. If the story book costs $1.60, how much money does Riordan have in dollars?