News & Resources
Algebra II with Trig Ch3.4. Absolute Value
Question from Rachel: Question involving absolute value in Algebra 2: 3.4. Example 5 on page 233 states that "If X<0, then |x| = -x. That really confused me. I thought that absolute value was just that - absolute! There are not supposed to be any negatives...
Algebra II with Trig Course Length
Question from Kathyrn: It appears the DVD and Guides only go through Chapter 8. Is this correct? If so, are there plans for going through the entire book with DVD and Guides? Answer from Dr. Callahan: Yes, it goes only through chapter 8. We have no schedule for doing...
Algebra 1 Solutions Manual
Question from Victoria: Harold Jacobs Elem. Algebra...is the online Teacher's Guide suppose to have the answers to what's in the Elm. Alg. book? Answer from Dr. Callahan: You need the "Solutions Manual for Elementary Algebra" by Harold Jacobs with Cassidy Cash. You...
Algebra 1 Ch4.4 #6
Question from Kai: Jacobs Algebra 1, Chapter 4, Lesson 4 (pg 167), problem 6 (c,d,e) I don't understand why the answers are negative. Thank You Answer from Dr. Callahan: Because in each case you have a minus sign in front of the fraction. so - 1/2 is the same as -0.5....
Algebra 1 Ch2.3 Function & Formulas
Question from Jake: We have a question on functions and the fact that they don't always have a formula. Would this be an example of a function without a formula? Say, for example that there was a function for rain, and the function was almost completely random, 2...
Algebra 1 Ch11.5 #11
Question from Josh: I'm doing Jacob's Elementary Algebra and I'm having difficulty on Lesson 11-5 problem 11. I don't understand how to simplify the problem by looking for common factors. Would you be able to provide any help? Thank You Answer from Dr. Callahan: You...
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