by DaleCallahan | Oct 13, 2017 | Algebra, Algebra Chapter 2, Errors, Known Algebra Errors
The test in the Teacher Guide for Test 2B on page 211 has an incorrect answer. The answer given in the solution manual is y=4x+1. The correct answer is y = 4x-3. Thanks Marybeth for catching this.
by DaleCallahan | Oct 4, 2017 | Algebra, Algebra Chapter 3, Known Algebra Errors
Angela’s son brought this error in the Earth cover Algebra I Solutions Manual to our attention. Thank you! The problem (Ch3.4 #9) wording changed completely from the salamander cover to the Earth cover. However, the solution in the old and new solutions manuals...
by DaleCallahan | Oct 3, 2017 | Real World Math
Just when you think math isn’t relevant in the real world, you learn that it takes math to make coffee. It takes machines to brew your coffee. Whether it’s a french press, a standard coffee brewer, or a pour over setup, when you make coffee,the...
by DaleCallahan | Sep 27, 2017 | Blog, Lifestyle
Around the world, education is not as often available as it is in more developed countries. Too many high school students that I work with here in the US take math education for granted. You see, a global perspective on mathematics and it’s place in the world is...
by DaleCallahan | Sep 12, 2017 | Algebra, Algebra Chapter 1, Known Algebra Errors
In Jacob’s Elementary Algebra Chapter 1 Review Set I Question 14b page 51. “What is the total number of atoms in x propane molecules as a sum?” The Solutions Manual for Elementary Algebra on page 14 lists the answer as: b) 3x + 5x The “5”...
by DaleCallahan | Aug 29, 2017 | Algebra, Algebra Tests, Errors, Known Algebra Errors
Test shows: 3(x+1)^1/2=(x+7)^1/2 while the answer booklet shows: 3(x+1)^1/2=(x-7)^1/2. The answer key is correct. For the test, please change the problem to 3(x+1)^1/2=(x-7)^1/2
by DaleCallahan | Mar 29, 2017 | Algebra, Algebra Chapter 2
Question from Cynthia: Answer from Dr. Callahan: You are correct. I assume you have a blue textbook and this is on page 72. It appears the problem got updated between versions and the solutions manual did not. The y-axis is the weight of the contestant in pounds after...
by DaleCallahan | Mar 14, 2017 | Algebra II with Trig, Blog
Some of the links in this article are affiliate links. We don’t carry in our shop all the materials you would need to complete this activity, so we use links to share with you the products you would want to use so that you can do this activity at home. Some of...
