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"The formulation of a problem is often more essential than its solution, which may be merely a matter of mathematical or experimental skill" - Albert Einstein
Announcements
Week 1-2 Quiz (3 attempts) due on Mon Feb 12
Week 3-5 Quiz (3 attempts) due on Mon Feb 12
Next unit exam (Algebraic Functions and Systems) on Mon Feb 12
Seminars
Seminar 5 (Jan 31 or Feb 1) - Train Function Junction (systems of equations)
Pre-lab consists of two questions in Mobius on solving a system of equations for a line between two points, and using function notation to interpret the location of a train as a function of time.
Today - Solve Applications of Systems, Solve 3x3 Systems Algebraically
Instead of finding the intersection of 2 lines, a 3x3 system looks for the intersection of 3 planes:
https://www.geogebra.org/m/uVwfjJjE
Notes from Moodle
Read Algebra and Trig 11.2
For More Information
Systems of Equations Word Problems (great practice exercises and videos)
Solving 3x3 systems of equations elimination
http://patrickjmt.com/solving-a-system-of-equations-involving-3-variables-using-elimination-by-addition-example-1/
http://patrickjmt.com/solving-a-system-of-equations-involving-3-variables-using-elimination-by-addition-example-2/
http://patrickjmt.com/solving-a-system-of-equations-involving-3-variables-using-elimination-by-addition-example-3/
http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/v/systems-of-three-variables
http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/v/systems-of-three-variables-2
Practice solving 3x3 systems
https://www.geogebra.org/m/j7zRFgks
Pre-read Algebra and Trig 11.8
Watch this 2:38 primer video on determinant of a 3x3 matrix
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