by DaleCallahan | Aug 25, 2020 | Education, Frequently Asked Questions, General High School Questions, High School Math, Homework Help
As you move deeper into each textbook (Algebra, Geometry, Algebra 2 w/Trig, Calculus, etc), the problems will contain several concepts you’ve learned earlier – all in one problem. This complexity can make it difficult to find the “how-to” or...
by DaleCallahan | May 12, 2020 | Geometry, Geometry Chapter 15
In Jacobs Geometry Chapter 15 Lesson 1 problem 57, we are asked, “In how many planes do the square faces of the cube faces of the unfolded hypercube lie?” The Solutions Manual says 13 planes. Let’s see how they got that number....
by DaleCallahan | Apr 3, 2020 | Geometry, Geometry General Course Questions, Homework Help
Geometry Course Chapters 13 and 16 were originally omitted from our Geometry course for time constraints. The concepts in those chapters are advanced, though not difficult. Students will not likely see them on the ACT/SAT or even in college, except for specialized...
by DaleCallahan | Jul 27, 2019 | Algebra, Algebra Chapter 16, Errors, Known Algebra Errors
This is an error in the book by Master Books (ISBN: 978-0890519851) – the book with the blue cover showing the world. The problem is discussing hens and rabbits with a total of 30 heads and 86 feet. ERROR: The solution manual is referring to the wrong problem...
by DaleCallahan | Jun 7, 2019 | Algebra, Algebra Chapter 13
Question from Grace: We are using this test A as a practice test. We can’t figure out how to solve this. Answer from Dr. Callahan: Grace, To solve this one, you take the square root of each side +/- SQRT ( 16x^2 + 8x +1 ) = +/- SQRT (9) The left side needs a...
