Question

store has a sale.the price is $17.55 for one book, $16.70 each for 2 books, $15.85 each for 3 books,and $15 each for 4 books.if this pattern continues,how much will it cost to buy 7 books

Answer 1

if my math is correct 15-.85=14.15  then 14.15-.85=13.30    then from there 13.30-.85=12.45