exam Maths Puzzle Numerical Ability

Solve for k: (2k-5)/-4 > 5

The answer given was (-theta, -15/2)

But, I think the answer should be (-15/2, theta)

How do I know for certain which side the theta is on?

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exam Other Question

What is the simplest form of (3^n)(9(^n-2))(sqrt4(^4n+2)/4(^2n+1) Note: the 4(^2n+1)is the denominator for all. Is it possible to build a triangle using the given side lengths? If so order the angle measures of the triangle from least to greatest. (Hint: Sketch each)
RS= (sqaure root of) 46, ST= 3(square root of)5, RT=5.