by DaleCallahan | May 30, 2013 | Algebra
Question from Renee, Please confirm the correct answers for Chapter 9 Lesson 2 on page 403–Problem number 4 (a-f). Answers seem wrong in the answer key. Seems to me they should all be “yes” except “d.” Am I wrong? Answer: In this...
by DaleCallahan | May 23, 2013 | Geometry
Question from Daniel, Would you explain problem 12 from lesson 14.5? How exactly do you calculate circular inches? Answer First, a circular inch is the amount of area taken up by a circle one inch in diameter. So that makes one circular inch = Area = pi*(d/2)^2...
by DaleCallahan | May 20, 2013 | Geometry
Questions from Teresa, I’m in Jacobs Geometry, Chapter 14, Lesson 2. The answer to problem 16 is 9 sin 20 degrees. How do you get that answer? Answer: First, from #15 you see we count 9 sides. So, n=9. For #16, based on the formula from Theorem 75 on page...
by DaleCallahan | May 18, 2013 | Algebra, Algebra General Course Questions
Question from Blake: Can you help me see why parenthesis and negative numbers matter together? Answer from Cassidy: Blake, I’ve made you a comparison problem to hopefully show why parenthesis matter with negative numbers. Can you see that in 1) the negative sign...
by DaleCallahan | May 18, 2013 | Geometry, Geometry Chapter 3, Known Geometry Errors
Question from Luke: In Jacob’s Geometry Chapter 3, Lesson 4, Number 36 – Something seems wrong with the proof? Help? Answer from Cassidy: Yes Luke – good call! It has a typo in line 3 of the proof. It should say PC besects...
