exam Maths Puzzle Numerical Ability

Simplify: [(27^-2x)(25^x)^4(3^6x)^1/2]/ 9^x(625^(x-1))^-2

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exam Other Question

A rectangle has a side length of 14 centimeters and an area of 98 square centimeters.Write and solve an equation to find the length of the other side of the rectangle.


Any straightfoward</u> and correct</u> help would be much obliged:)~:)
what is g(x)=-2x