Posted by **erin** on Saturday, July 28, 2007 at 3:55pm.

1)Cramer's Rule is used to solve the system of equations:3m-5n=12,4m+7n=-5

Which determinant represents the numerator for n?

answer=[12 -5]

[-5 7]

2)Cramer's Rule is used to solve the system of equations:3x-y+2z=17,4x+2y-3z=10,and 2x+5y-9z=-6

Which determinant represents the numerator for z?

answer=[3 -1 17]

[4 2 10]

[2 5 -6]

3)Which matrix would NOT be used to write a matrix equation for the system of equations:5m-2n=13 and -m+n=-2?

answer=[5 -2]

[-1 1]

4)Which product would be used to solve the matrix equation below by using inverse matrices?

[3 -4][a] [6]

[2 1] [b]= [7]

answer=1/11[1 4] [6]

[-2 3][7]

Thanks for the help:)

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