Debbie Poss's Blog

Accelerated Math II - Matrix Test Today - May 14, 2013

Thursday we will be taking a reassessment - which is a retest on 1 test which you have taken this semester and feel you can imporve upon.  This means that tomorrow, May 13, 2013 I MUST know by 4 PM which test you wish to retake or else you will not have one ready for you.  And this reassessment day will NOT be changed.  Furthermore, I can't accept any make-up work past Friday, May 15, 2013, so please make up all work by then or a 0 will be entered for that grade. :-(

On another note, here is the final exam review:  Download Accelerated II B Final Exam Review .  We will be working on that for the rest of the semester.

Accelerated Math II - Review forTest tomorrow - May 13, 2013

Problems have already been found with the answers to the review sheet.  Chapter Test C answers should be:

#15:  (-78/23, -22/23, 84/23)

#16:  All entries should be divided by-14.

#23:  {-34, 52, 3, -2, 9, -8, 2, 3, -45, 71}

Accelerated Math II - Vertex Edge Graphs, etc. - May 9, 2013

Today we looked at an example of Vertex Edge Graphs although the homework deals mainly with other applications.  It is:

Pg. 52: 1 - 17 odds and 18 - 21    and   Pg. 58: 1 - 15 odds and 16

Your test is on Tuesday and you got your quizzes back so start reviewing.:-)

Accelerated Math II - Secret Codes and Areas of Triangles - May 8, 2013

Today we checked the secret code homework and discovered that matrices can be used to find areas of triangles.  The assignment for tonight is from the math III book:  Pg. 41: 12 - 15 , Pg. 42: 13 - 14, Pg. 46: 15, Pg. 47: 13, 14, Pg. 51: 1 - 9  

Accelerated Math II - Secret Codes - May 7, 2013

Today we looked at secret codes and how matrices can be used to make them.  The assignment is problems on the worksheet 1 - 5 and (if you haven't already done it) the "Ordering Paper Mini-Task".

 JUST to be clear on problem #2:  You create your own encoding 2 X 2 matrix and you write a message.  Be sure your message is clear and one that you don't mind anyone in the class (including me) reading.  Use the method described on page 1 to ENCODE your message.  Then, on one side of your index card, write only your name.  On the other side, write A) the matrix you used to encode your message and B) the ENCODED message (not written as a matrix, but just written as a set of numbers separated by commas).  Tomorrow I will take up these index cards, shuffle them and give them out to other students who will try to decode your message.

Accelerated Math II - Quiz today - May 2, 2013

Today students took a quiz on matrices and we looked again at Gauss-Jordan.  After that students could work on homework:  Here is the tentative schedule for the rest of the year.  Download Tentative Matrix Plans

Accelerated Math II - Quiz Review - May 1, 2013

Remember that tomorrow you have a quiz on matrices.  So far we have:

Defined the matrix,  its dimensions and elements in it by location.  Ex. A _1,3 means the element in the first row and second column.) 

Learned how and when to add, subtract, multiply matrices by scalars and multiply matrices by other matrices.

Learned how to find determinants of any square matrix.

Learned how to find additive inverses, additive identities, multiplicative identities of any matrix and multiplicative inverses of 2 X 2 matrices. 

Learned how to write a system of equations as a matrix equation and how to solve it using a calculator.

Learned how to prove some properties of matrices.

Gauss-Jordan elimination will NOT be on the quiz.

Accelerated Math II - More systems - April 19, 2013

Today we continued to look at the application problems.  The assignment for this weekend is:

Lesson 3.4 Practice A odds

Lesson 3.6 Practice C  1, 4, 7, 10, 13 - 18

Need help in solving a system of 4 equations and 4 unknowns?   See

http://www.algebra.com/algebra/homework/equations/Equations.faq.question.164381.html

Accelerated Math II - Parallel and Perpendicular Investigation - April 19, 2013

If two lines are both parallel to a third line, then…

 they are parallel to each other.  (All 3 lines are parallel.)

 If two planes are both parallel to a third plane, then…

 they are parallel to each other.  (All 3 planes are parallel.)

If two lines are both perpendicular to a third line, then…

 No conclusion...  They could be parallel or they could be skew or they could intersect.

If two coplanar lines are both perpendicular to a third line, then…

 they are parallel.

If two planes are both perpendicular to a third plane, then…

 No conclusion...  They could be parallel or perpendicular or they could just intersect.

If two lines are both perpendicular to the same plane, then…

 they are parallel.

If two planes are both perpendicular to the same line, then…

 they are parallel.

If a line is perpendicular to one of two parallel planes, then…

 it is perpendicular to the other.

If a plane is perpendicular to one of two parallel lines, then…

 it is perpendicular to the other.

**If a plane intersects two parallel planes, then…

 the lines of intersection are parallel.

Be ready to explain the following statements:

If 2 lines are parallel to the same plane, no conclusion can be made.

If 2 planes are parallel to the same line, no conclusion can be made.

 

Accelerated Math II - Applications of Higher Degree Systems - April 18, 2013

More Answers to last night's worksheet are:

23.  (17, 11, 22)

24.  40/9 hours

25.  4 hours for A, 2 hours for B, 5 hours for C

26.  A = 80 ohms, B = 120 ohms and C = 240 ohms

27.  G1 = 380 pounds, G2 = 60 pounds, and G3 = 160 pounds

28.  a = 8, v₀ = 2 and c₀ = 5

29.  A)  I1 = 0, I2 = 2 and I3 = 2       B)  I1 = 3/4    I2 = 3   and I3 = 9/4

30.  A = 10000, B = 5000 and C = 20000

31.  B = 1/8 pound   C = 3/8 pound   and K = 1/2 pound

32.  Next spring there are should be 480 adults, 150 yearlings and 200 calves (assuming mothers die after giving birth).   Last spring there were 400 adults, 50 yearlings and 200 calves (given same assumptions).

35.  Equations are:  800 = a + 80c + ke²     560 = a + 80c + ke^1.2    340 = a + 0c + ke⁰      (You know what e is...)  Is it 2134?