News & Resources
Geometry Ch3.6 #11
Question from Kimberly: p. 113 "Sun Directions"Says, "If a circular protractor...the coordinate of OA is 50."What are we missing? Seems like it should be 45, not 50. Answer from Dr. Callahan: This is a given - not a question. This is telling how the sun moves...
Algebra Ch13.6 #9h – Completing the Square
Question from Cynthia: Algebra I Chapter 13 Lesson 6 Problem 9 h. If we follow the books example on page 632 we get the correct answer. If we try to use your DVD's formula for this lesson we can not get it to work out at all. Answer from Dr. Callahan Yes, this is...
Algebra II with Trig Ch1.3 #73
How do we work Algebra II with Trig Chapter 1.3 #73? Solution a) Area after purple section cut out A = (20 times 20) - 4(x^2) = -4x^2 + 400 = -4(x^2 - 100) = -4(x + 10)(x - 10) b) V = Area of bottom times height = (20-2x)(20-2x) x = (400-80x+4x^2)x =...
Geometry Ch2.2 #28, 29, 30
Question from Lisa We were working on Lesson 2-2 today and had difficulty understanding the Euler diagram in #29. As I understand it, the diagram is saying “If it is frozen carbon dioxide, then it is dry ice." What I don’t understand is how you go from "Only if it is...
Algebra II with Trig Question – Is my Son Ready?
Question from a mom! My homeschooled son struggles in high school math. He is very bright and has taken Algebra 1, Algebra 2, and Geometry with Teaching Textbooks. However, he is not a "math mind" and scored low on his yearly tests. He is going into his senior year,...
Teaching Your Kids To Decide What to Do Next
This may sound silly, but your children’s biggest challenge in life is likely to be making a daily decision of what to do next. Really. In the current job market, most people are not ever told what to do next, but instead they are left to their own devices to make...
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