Express 6.86 as a mixed number
2 answers:
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Answer:
C)5
Step-by-step explanation:
For a 3x3 matrix
determinent is given by = = a(ei − fh) − b(di − fg) + c(dh − eg)
Given Matrix
determinent of matrix= -6((-3)(-3) − (4)(4)) − 7(a(-3) − (4)(-6)) + 1(a(4) − (-3)(-6))
-19= -6(9-16) - 7(-3a+24) +4a-18
125= 25a
125/25= 25a/25
a= 5 !