# Algebra 2(check pt 4)

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?
[-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?
[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?
[-1 1]

4)Which product would be used to solve the matrix equation below by using inverse matrices?
[3 -4][a] 
[2 1] [b]= 
[-2 3]
Thanks for the help:)

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1. I am so stuck on these same exact problems on my Algebra 2 test.

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posted by Chels

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