book Maths Puzzle Numerical Ability

-5 times -2 times -2 squared equals

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Nicholas

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The length of a rectangle is 2 in. more than twice its width. If the perimeter of the rectangle is 34 in., find the dimensions of the rectangle. I am having trouble with Algebraic Fractions. My question is Reduce the fraction -20 t^5u^2^v^3/48t^7u^4v?????? Is the answer -5t^2v^2/12u^2????? I am confused where I am supose