by DaleCallahan | Jun 10, 2014 | Calculus
Question from Alyanya: Hello,I am looking for a math course for my daughter who just finished her sophomore year of high school. She received a 97 in Algebra 2 Pre-AP and was planning on taking Pre-Calculus Pre-AP next year. However we have decided to home school...
by DaleCallahan | May 17, 2014 | Algebra II with Trig
Question from Elisha: I just took the Trig. Final Test for your Alg. 2/ Trig. Course. My mom and I were checking it and on problem 26 from section 8.3, my answer is different from the one you give in the answers. I see that you add 45 degrees to the 25-degree angle...
by DaleCallahan | May 17, 2014 | General High School Questions
Question from Melissa: I am trying to decide which course to do first? My son is finishing 8th grade this year and has completed Alg 1. As a freshman, he would need either Geometry or Alg2/Trig. Is there a preferred sequence? Would the sequence matter for the SAT...
by DaleCallahan | Jan 9, 2014 | Frequently Asked Questions, General High School Questions
Question from Joe: The DVDs do not seem to play on Windows 8. Any suggestions? Answer from Dr. Callahan: Try this How to Play DVDs on Windows 8
by DaleCallahan | Dec 13, 2013 | Algebra
Question: We just started Elementary Algebra a couple weeks ago after frustration with Saxon. We are struggling with Chapter 2, Less 3, #6. How do I teach my son to determine if these graphed coordinates are a function? He understands the tables and graphing...
by DaleCallahan | Sep 14, 2013 | Algebra, Known Algebra Errors
Ch10.6 #17c The correct answer should have a minus sign and be (x^3 – y^3)^2
by DaleCallahan | Sep 5, 2013 | Algebra, Algebra Tests
First the total point on the test should be 56 and not 58! Second – the wrong problem is solved in the solutions. Should read Area = 48 So to solve for x you get 6(x+5) = 48 6x + 30 = 48 6x = 18 x = 3...
by DaleCallahan | Sep 5, 2013 | Algebra, Algebra Chapter 2
Question: Why does the perimeter not vary directly with it’s length (when the length changes) Answer from Dr. Callahan: If you look at the formula for perimeter is becomes P = 2x + 6 We see it is linear, y = ax + b but a direct variation is a subset of linear...
