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Add

• 11    8
  -4     2
• 3     2
  -6    -6
• -3    2
  -4    -6
• 10    8
  -6    2

find: B*A

• 47     30
  9     5
• 17     15
  42     35
• 10     25
  7     1
• not possible because rows do not match columns

Multiply

• 20     15    -10
  30     -5         0
• -20      15     -10
  30     -5          0
• 1        8       3
  11     4        5
• 20     -15     10
  -30         5        0  

Use Cramer's Rule to Solve the Following:
2x - 5z = 6
-3x + 4y - 2z = 26
-3x + y - 4z = 18

• (-6, 5, -3)
• (5, -6, 4)
• (5, -6, -3)
• (-2, 4, -2)

Solve using Cramer's Rule:
x - 3y - 5z = 7
-y - 4z = 11
-3x - y + 3z = 5

• (1, -5, -3)
• (-5, 1, -3)
• (2, 0, 3)
• (0, 2, 3)

Solve for x and y using CRAMER'S RULE
3x + 2y = 16
7x + y = 19

• (-2,5)
• (-2,-5)
• (2,-5)
• (2,5)

Solve for x and y.  Use Cramer's
2x − 3y = −1
 y = x − 1

• (-2,-3)
• (0,-1)
• (3,4)
• (4,3)

Write the equation for the graph

• y = 5x - 3

• y = 4x + 2

• y =-2x + 5

• y = - 2x + 4