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Asked Mar 19, 2019
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I need help with #27,29

SECTION 7.7
SECTION EXERCISES
For the following exercises, solve the system using the inverse of a 2 x 2 matrix.
27. 5x-6y =-61
4x+3y 2
28. 8x + 4y-:-100
3x -4y 1
29. 3x-2y = 6
30. 5x-4y -5
4x+y- 2.3
-x + 5y =-2
31. -3x - 4y 9
2 5
12x + 4y =-6
For the following exercises, solve a system using the inverse of a 3 x 3 matrix
38. 6x- 5y+2z-4
12
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SECTION 7.7 SECTION EXERCISES For the following exercises, solve the system using the inverse of a 2 x 2 matrix. 27. 5x-6y =-61 4x+3y 2 28. 8x + 4y-:-100 3x -4y 1 29. 3x-2y = 6 30. 5x-4y -5 4x+y- 2.3 -x + 5y =-2 31. -3x - 4y 9 2 5 12x + 4y =-6 For the following exercises, solve a system using the inverse of a 3 x 3 matrix 38. 6x- 5y+2z-4 12

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