SOLUTION: During a sale,a customer Can buy one book For b dollars. Each additional book costs d dollars less than The first book. For example, The cost of the Second book is b—d dollars.

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: During a sale,a customer Can buy one book For b dollars. Each additional book costs d dollars less than The first book. For example, The cost of the Second book is b—d dollars.       Log On


   

Question 1141361: During a sale,a customer Can buy one book For b dollars. Each additional book costs d dollars less than The first book. For example, The cost of the Second book is b—d dollars. Which of the following represents The total cost, in dollars of 5 books during the sale?
A) 2b—5d
B)2b—d
C)5b—5d
D)5b—4d
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
i believe selection D is the answer.

first book is b dollars.
second book is b - d dollars.
third book is b - d dollars.
fourth book is b - d dollars.
fifth book is b - d dollars.

sum of the b's is 5
sum of the d's is 4

total cost is 5b - 4d