Comic of the Day
"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
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