Posted by Keisha on Thursday, March 13, 2008 at 10:07am.
Find the value of "a" if the deteminant of
(6 3)
(4 a)IS:
a)6 b)3 c)0 d)12
(the matrix is six above and four below,three above and "a" below)

matrices  Reiny, Thursday, March 13, 2008 at 11:03am
the determinant of your matrix is
6a  12
to solve for a we must know what that is equal to.
Are the choices you give possible answers for a? If so, you don't have enough information
Are the choices you give the value of the determinants? Then you have 4 different questions and I will do the first one
for a) 6a12 = 6
6a = 18
a = 3
do the others the same way.
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