exam Maths Puzzle Numerical Ability

Find all the numbers for which the rational expression is undefined:
q^3-8a/q^2-64

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exam Other Question

7. x + 2y � z = 6
2x - y + 3 = 13
3x � 2y +3z = 16
Solve each system of equations algebraically using the method of substitution or the method of elimination. If Is there a way to find the height of an object using its shadow?