exam Maths Puzzle Numerical Ability

How do I solve this problem? The instructions say Checking Solutions Tell whether the given ordered triple is a solution of the system.

(-5, 1, 0)
3x+4y-2z=-11
2x+y-z=11
x+4

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exam Other Question
Karen invested some money at 9% annual simple interest and $250 more than that amount at 10% interest. If her total yearly interest from both accounts was $101, how much was invested at each rate A hyperbola is the only conic that has ____________?
focii
vertices
asymptotes
a minor axis