exam Maths Puzzle Numerical Ability

Could I please get assistance with the following problem:

Find the determinant of:
-4 0
1 3
the numbers are enclosed with vertical lines.

Thank You

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exam Other Question

I need help with this problem. I think i know what i am doing but i am insecure. I need to know if this problem is even, odd, or neither.

f(x)= x + |X| Could someone help me on this problem?

I need to graph the following inequality:

x <-2

Do you know how to show the graph for me?
Thanks,
Lisa