Algebra 2(check pt 4)
posted by erin .
1)Cramer's Rule is used to solve the system of equations:3m5n=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:3xy+2z=17,4x+2y3z=10,and 2x+5y9z=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:5m2n=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:)

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