Ranger simplified this expression. 3(2.7x + 5) – 2(4x – 1.6)

What was Ranger’s simplified expression?
0.1x + 18.2
–16.1x + 11.8
16x – 18.2
–0.1x + 11.8

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?