exam Maths Puzzle Numerical Ability

Decide whether the given ordered pair is a solution of the equation.
x=-4,(1,-4)

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exam Other Question

ok first i since my computer does not have square roots i will use a big V.Vx3(exponent)y V9x3(exponent)y + 6xVxy surface area of cone with radius 9 and slant hieght 12