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Maths Puzzle
Numerical Ability
Solve the following system by using the Gauss-Jordan Method:
6 3 -1 : 5
-5 -6 7 : -6
4 -4 9 : 2
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During the summer Tom mows lawns in his neighborhood. When he works he charges a flat fee of $27 plus a fee of $6 for each 100 square feet he mows. Yesterday he mowed the lawn of
x^4 - 3x^2 + 2 = 0