Question

Suppose a 3x5 coefficient matrix for a system has three pivot columns. Is the system consistent? why or why not?

Answer 1

we have
1*1 + 8*1/100 + 9*1000

this can be written as,
1 + 0.08 + 0.009

we get 1.089

hope this help

Answer 2

Yes, well there can be many reasons but actually its not inconsistent as there are no zero rows meaning there is no row that just has 0's