Download 1 - TeacherWeb

Pre-Caleulus: WS E
Name----'--"'--'--"---------K f. Y
Date------ Period
Solving Systems of Equations w/Matrices
1. Write the matrix equation. 2. Solve each system of equations with Matrices. No Graphing
Calculators.
1) -3x- 2y= 16
2x+6y=-20
2) -3x-y=-l5
-4x+4y= 12
3) -3x- 3y=-3
-5x-5y=-5
4) 3x + 2y = -6
-2x - 3y = 14
L-:, -_ 1 L � J " L:{ J
's
E
no
', 'n'lerSC'
s.i..®
5) -4x + 3y = 13
-2x +Sy= 3
l
6) -2x- 4y = 2
2x-4y =-18
r-� - �] c; 1 = � �J
l
8
21
Find the inverse of each matrix using your graphing calculator.
7)
1
4
1 5
0 -5
51
-5
-3
2
8) -1
-6
-1-
7 -1
-2
1 -1