Math 146: College Algebra 


Dr Langford
Contact me:
e-mail:
laurel.langford@uwrf.edu

My office location: 207B NH
My office phone number:
715-425-4360
Grading policies, etc
Syllabus
graph of a cubic polynomial

Tues NH 205
Thurs NH 205
 

Sept 5:  Linear Equations
Homework: 1.1 # 7, 11, 13, 17, 21, 25, 27, 31, 33, 35, 39, 47   

Sept 10: Quadratic Equations by factoring and the quadratic formula
Homework:  1.4 (pg 112) # 13, 15, 17, 19, 21, 23, 51, 53, 55, 57, 59, 61
 

Rational and radical equations
HW: sec 1.6 (pg 133) # 3, 5, 7, 9, 11, 13, 15, 17, 19, 65, 67, 69

Sept. 17 Complex numbers and review of quadratics

HW  1.1 # 43, 44
1.4 # 16, 18, 54, 56
1.3 # 17, 23, 27, 29, 37, 51, 53

Applications
HW: Do these problems on the handout (answers included)
And also do 1.2 # 35, 41 and 1.5 # 49
Homework help: video on density problems
video on mathematical thinking with the ideal gas law
Work ahead before Tuesday by watching videos and trying practice problems here:
Linear inequalities: Video, Practice
Quadratic inequalities: Video, Practice
 
Sept 24 Inequalities. Assignment:
1.7 # 13, 17, 19, 21, 23, 41, 43, 45, 47
1.8 # 9, 11, 13, 14, 27, 29, 31, 35
Video: solving absolute value equations (watch first half)
Absolute value inequalities: Khan academy, My explanation
Messy numbers in a quadratic: TI-30 and TI-83
Review problems

Class Cancelled

Oct 1: Review for Chapter 1 test
 Chapter 1 test
Oct 8: Lines
HW: 2.5 #  13, 14,  29, 31, 33, 35
Practice test 1 problems like 1, 3,13/ 17

Solutions to: section 2.5 problems
Solutions to the practice problems 1-8; solutions to the practice problems 9-11 (video)
More test 1 type problems practice (quadratic formula).  These problems are part of the homework assignment.
Homework problems from the book: 2.5 # 5, 7, 9, 11, 15, 17, 19, 39, 41, 45, 47
Announcements
Solutions to the practice problems are here; a video showing how to use a TI-30 to get the calculated answer for #5; a video showing how to use a TI-83 to get a calculated answer for #6.
Solutions to the book problems are here.
Oct 15:  Graphing from basic functions
HW 2.7 # 7, 13, 17, 23, 53, 55, 59, 63, 71
More problems sheet
Solutions to problem sheet;
Solutions to textbook problems
More graphing from basic functions
2.6 # 21, 23, 27, 29, 31, 51
2.7 # 79, 81, 83
Solutions are here
Oct 22:Circles. HW 2.2 # 5, 7, 13, 15, 19, 21
Solutions
Parabolas
HW 3.1 # 1, 3, 13-21 odd
Class notes
Practice problems for test (corrections to 5a and 8b)
Test announcements and more practice problems
Practice solutions to the first practice page
Oct 29: Test 1 retake practice problems answers

Chapter 2 test

Nov 5: Long division and synthetic division
HW 3.2 # 1, 13, 21, 23, 29, 31
Notes
Khan Academy videos
 Factoring Polynomials
Notes
HW 3.3 # 17, 19, 21, 35a, 39a, 43, 46
Solutions
A relevant youtube video

Nov. 12 Graphing polynomials
Class Notes
HW 3.4 # 31, 33, 35, 41, 65, 67, 69
1.7 # 39, 41, 43, 45
Solutions

Graphing rational functions
Notes
HW: 3.5 # 61, 63, 67, 71, 77, 79, 83
Solutions
Videos:
Overview of a problem
Sign charts
End behavior
Nov. 19: Review: Practice problems for test
Class notes and review solutions
See the videos posted on the Nov 14th links for more in depth explanations
Chapter 3 test half test: Factoring polynomials (3.3), Graphing polynomials (3.4), Graphing rational functions (3.5)
Function lesson after the test.
Notes
HW 2.3 # 9-15 all, 17, 19, 20, 22, 25, 31
2.8 # 65, 67, 71
Solutions
Nov 26: Exponential functions and inverse functions
If you didn't do 2.8 # 65, 67, 71 before, do it now.
4.1 # 41, 59a, 63a, 69a, 77, 79
4.2 # 17, 19, 29, 31, 33, 37, 61, 65, 66, 79, 81
Additional instruction on 2.8, 4.1, 4.2:
2.8 Text, Video (short review)
4.1 Text, Video (longish lesson)
4.2 Text, Video 1, vid 2 
Note: the text notes for each section include the homework answers on the last page.

Happy Thanksgiving 

Dec 3 : Logarithmic functions Notes
HW 4.2 # 87a, 88a; 4.3 # 1a,b,c,d,e, 13, 17, 19, 21, 25, 27, 29
Solutions
Videos to preview Thursday.  On Khan Academy, scroll down to Properties of Logarithms watch the intro to logarithm properties part 1 and 2.

Exponential and logarithmic functions
Notes and homework assignment

solutions

Dec 10: Exponential growth and decay
Notes and homework assignment
Solutions
Review Problems
Solutions to review sheet
Notes from class
A sheet of formulas you need to memorize.  I will give you the first (blank) page to fill in from memory, and which I will collect (each formula is worth a few points).  Then (when everyone at your table is done) I will pass out the complete (second) page, so everyone has the correct formulas during the main part of the exam.
Note final exam week office hours below.

 Final Exam Week Office Hours: I will hold office hours Tuesday 11-2 and Wednesday 11-2 in the Math Help Center. Email me for my availablility at other times.

Final Exam 12/19/19. 10:15-12:15