exam Maths Puzzle Numerical Ability

Please help me sole this: FIND THE DOMAIN OF THIS FUNCTION: h(x)=10/(x^2-2x).

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exam Other Question

Solve each system by the addition method. Determine whether the questions are independent, dependent, or inconsistent.

3x-4y=9
-3x+4y=12 Graph the inequality.
3x + y_<_5

Of course the line is a solid line under the < If someone could help me with this problem AND how to write the < with a line under it I would appreciate it.