Math III Test # 1 Review

This morning in Math III we reviewed for our matrix test, which we will take Thursday, 1/24.  Here are the answers to the review packet.

1) A
2) C
3) A
4) C
5) D
6) B
7) x = 1, y = - 3
8) x = - 1, y = 1
9) A
10) D

For the matrices, I'm not sure how it will come across on the blog.  I will type it in as best as I can and I hope it will look alright.

11)   12     9      15
        8       6      10
        20    15     25

12)   - 10/38     - 6/38
        - 3/38        2/38

13)     14     - 24
          -18    - 2
         34      14

14)     - 1     - 3
         - 3/2    5

15)    5      - 42
        - 18     22
       - 23     26

16)  Can't be done

17)      1   0
           0   1

18)                               Addition      Multiplication
          Commutative         YES               NO
          Associative            YES              NO

19)         x = - 1 , y - - 5


       

Trig Graphing

PurpleMath is a great place to find info about math concepts.  Here's a link to graphing trig functions:

http://www.purplemath.com/modules/grphtrig.htm

Here's trig graph paper I said I'd put up here:

http://mathbits.com/MathBits/StudentResources/GraphPaper/Trig2pito2pi.pdf

The secret word is ...

The answer to the last problem in Math III today is ( - 3, 7 ).

Here is a link to some instruction on Cramer's Rule, if you would like to see more about it:
http://www.coolmath.com/algebra/14-determinants-cramers-rule/01-determinants-cramers-rule-2x2-01.htm

Here's some practice with determinants and Cramer's Rule.  I wouldn't go past # 17.:
http://hotmath.com/help/gt/genericalg2/section_4_3.html

Math Tournament!

If any Math Team members, or interested members, want to compete at a tournament in Americus, I need to know ASAP.  Contact me or Mrs. Phillips as soon as you can.  Here's a link to the tournament details: http://gsw.edu/Academics/Schools-and-Departments/School-of-Computing-and-Mathematics/Departments/Mathematics/Mathematics-Tournament/highSchoolMathTournament

Grading Finals Update

I hope to have the Math IV finals graded by the time I leave today ... but, I won't have the scores all added up yet.  Check Power School around 9 ish tomorrow morning.  That's probably when I'll be done with 1st and 2nd grades.  Sorry.  There's a lot of exams to grade!

Stats Formulas

UPDATE:  Thanks to Mrs. Sarver, I think you can link to the formula sheet.  Click on the "here" in the next sentence.  I am attempting to attach a statistics formula sheet that I was requested to make here.  I would refer to the post below about Georgia Virtual School for more study aids for the Stats Test in Math IV Thursday.

I can't figure it out because of all the subscripts and special notation.  I told you I would have the formulas on the board, but if you'd like this formula sheet, send me an email and I'll email the sheet to you.

mlewis@oconeeschools.org

GA Virtual School

In Math IV today we discussed the resources available at Georgia Virtual School.

This link will take you to the GVS page pertaining to Math IV.

This link will take you to the Data and Statistics Unit videos we were looking at today.

Let me know if the links don't work.