exam Maths Puzzle Numerical Ability

[5 9 -4]
[1 2 -2]
[3 4 -5]
find the matrix inverse with the identity matrix on the right side

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exam Other Question

I have to graph this inequality. Am I on the right track?

4x + y > 4
4(0) + 0 > 4
0 > 4 false statement solvethe rational inequality and graph the solution set on a real number line. express the solution set in interval notation.

x-9/x+1 >0