### Search this blog

### Twitter

Error: Twitter did not respond. Please wait a few minutes and refresh this page.

### Blogs with Benefits

### Archives

- December 2018
- July 2018
- June 2018
- May 2018
- April 2018
- February 2018
- January 2018
- November 2017
- October 2017
- September 2017
- August 2017
- April 2017
- February 2017
- November 2016
- August 2016
- June 2016
- May 2016
- March 2016
- February 2016
- January 2016
- December 2015
- November 2015
- October 2015
- September 2015
- July 2015
- June 2015
- May 2015
- April 2015
- January 2015
- December 2014
- November 2014
- October 2014
- September 2014
- July 2014
- June 2014
- May 2014
- April 2014
- March 2014
- February 2014
- January 2014
- December 2013
- November 2013
- October 2013
- August 2013
- July 2013
- May 2013
- April 2013
- March 2013
- February 2013
- January 2013
- December 2012
- November 2012
- October 2012
- September 2012
- August 2012
- July 2012
- June 2012
- May 2012
- April 2012
- March 2012
- February 2012
- January 2012
- December 2011
- November 2011
- October 2011
- September 2011
- August 2011
- July 2011
- June 2011
- May 2011
- April 2011
- March 2011
- February 2011
- January 2011

# Category Archives: equations

## Evaluating energy efficiency claims

Artifact This (or other) energy efficient light bulb package(s). So many opportunities here, depending on how targeted you want to be. Or, if you prefer, what kind of problem you plan to facilitate. There’s a clear nod to systems of … Continue reading

Posted in algebra, equations, estimation, stepwise functions, systems of equations, tasks
7 Comments

## Underground parking spots cost $30000-$50000 to build in D.C. This smells like a systems problem.

Artifact The Washington City Paper has a (rather lengthy) post on parking in D.C. Fair warning: it’s pretty wonky with zoning rules, ordinances, etc. However, the numbers caught my eye: … An underground parking spot costs between $30,000 and $50,000 … Continue reading

Posted in algebra, equations, systems of equations, tasks
Leave a comment

## A stop-sign vs. a stoplight; when does each make sense? (Part 2, Math modeling)

I know itâ€™s been a while since we visited this, but quick recap: We want to figure out when it is appropriate to have a stop-sign at an intersection versus a stoplight. In Part 1, we made some assumptions about … Continue reading

Posted in algebra, equations, projects, tasks
Leave a comment

## Let’s graph this and/or make it better; What constitutes a “blown game?”

A few minutes ago the other day, NPR’s Mike Pesca tweeted his mathematical rule as to what constitutes a “blown game” in basketball. That means if at any time a team is winning by (# of minutes left in the … Continue reading

Posted in algebra, equations
Leave a comment

## A stop-sign vs. a stoplight ; when does each make sense? (Part 1, Math Modeling)

Artifact Can we use math modeling and/or equations to answer the question of when it becomes advantageous to install a stoplight vs. a stop-sign? Can we “ambush” students by having them create equations without really knowing it? What are some … Continue reading

Posted in algebra, equations, tasks
4 Comments

## The Wacky Algebra of NFL Passer Rating

Artifact The following formula calculates NFL Passer rating. (wiki) (note: each component has a predetermined MAX and MIN value that appeared to be pulled out of thin air.) Personally, I would simply present this equation to students at the beginning … Continue reading

Posted in algebra, equations, tasks
Leave a comment