Life After preCalculus 2010 Session 102 matrix

1. Math 4R preQuiz11B Name:
For each question: Show all work. Justify each answer in the space provided. Circle final answers.
(1) NO CALCULATOR:
3x – 2y = 4
5x – 4y = 0
(1a) Rewrite this System of Equations as a Matrix Equation: AX = B.
(1b) Find x using Cramer’s Rule.
(1c) Find y using Cramer’s Rule.
(1d) Check your answers via substitution.
a:QUIZ11B.4Rq

2. Math 4R preQuiz11B Name:
For each question: Show all work. Justify each answer in the space provided. Circle final answers.
(2) NO CALCULATOR
3x – 2y = 4
5x – 4y = 0
(2a) Rewrite this System of Equations as a Matrix Equation: AX = B.
(2b) Rewrite your Matrix Equation: X = A-1B.
(2c) Calculate the X vector.
(2d) Does your answer check?
a:QUIZ11B.4Rq

3. Math 4R preQuiz11B Name:
For each question: Show all work. Justify each answer in the space provided. Circle final answers.
(3) CALCULATOR ACTIVE
x+y–z=6
3x – 2y + z = –5
x + 3y –2z = 14
(3a) Rewrite this System of Equations as a Matrix Equation: AX = B.
(3b) Find x using Cramer’s Rule.
(3c) Find y using Cramer’s Rule.
(3d) Find z using Cramer’s Rule.
a:QUIZ11B.4Rq

4. Math 4R preQuiz11B Name:
For each question: Show all work. Justify each answer in the space provided. Circle final answers.
(4) CALCULATOR ACTIVE
x+y–z=6
3x – 2y + z = –5
x + 3y –2z = 14
(4a) Rewrite this System of Equations as a Matrix Equation: AX = B.
(4b) Rewrite your Matrix Equation: X = A-1B.
(4c) Calculate the X vector.
(4d) Does your answer check?
a:QUIZ11B.4Rq