AllExperts > Word Problems 
Search      
Word Problems
Volunteer
Answers to thousands of questions
 Home · More Word Problems Questions · Answer Library  · Encyclopedia ·
More Word Problems Answers
Question Library

Ask a question about Word Problems
Volunteer
Experts of the Month
Expert Login

Awards

About Us
Tell friends
Link to Us
Disclaimer

 
 
 
 
About Scott A Wilson
Expertise
Story problems with any relation to math.

Experience
I started doing story problems in grade school and have been helping people ever since.

Education/Credentials
BA in Mathematical Sciences from OSU. MS in Mathematics from OSU

Awards and Honors
Both my BS and MS degree were with honors.

Past/Present Clients
Thousands of questions right here.

 
   

You are here:  Experts > Science > Math for Kids > Word Problems > Advanced algebra

Word Problems - Advanced algebra


Expert: Scott A Wilson - 10/26/2009

Question
A math teacher has a ream of 500 sheets of graph paper. Each week the advanced algebra class uses 90 sheets.
       a. about how many sheets are left after w weeks
       b. after how many weeks will there be 50 sheets left

Answer
a. There are 90 used per week, so that is -90w.
They start with 500, so the number of sheet left is 500 - 90w.

b.  To solve 500 - 90w = 50, add 90w - 50 to both sides.
That gives us 500 - 50 = 90w.
Combining the 500 - 50. we get 450.
So the answer is 450 = 90w.
Dividing by 90 gives us 450/90 = 5 and 90w/90 = w, so we have 5 = w.


Add to this Answer   Ask a Question


 
User Agreement | Privacy Policy | Kids' Privacy Policy | Help
Copyright  © 2008 About, Inc. AllExperts, AllExperts.com, and About.com are registered trademarks of About, Inc. All rights reserved.