SOLUTION: Expressions: 1. I buy 2 books costing $x each. I pay for the books with a $20 note. How much change do I receive from the $20 note? My e mail: mirafive@gmail.com

Algebra ->  Probability-and-statistics -> SOLUTION: Expressions: 1. I buy 2 books costing $x each. I pay for the books with a $20 note. How much change do I receive from the $20 note? My e mail: mirafive@gmail.com       Log On


   

Question 849492: Expressions:
1. I buy 2 books costing $x each.
I pay for the books with a $20 note.
How much change do I receive from the $20 note?
My e mail: mirafive@gmail.com
Answer by josgarithmetic(39626) About Me  (Show Source):
You can put this solution on YOUR website!
Cost: 2%2Abook%2A%28x%2Adollars%2Fbook%29=2x%2Adollars
Payment: 20%2Adollars

Dollars Change You Receive?
If 20-2x%3E0 Then you receive some quantity of change in units of dollars.