exam Maths Puzzle Numerical Ability

The length of a rectangle is 50 ft. The perimeter of the rectangle is 275 ft. more than the width of the rectangle. Find the width

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I need to know this it says find the GCF of the terms of each polynomial.
4n4 + 6n3 -8n2

please let me know what it should be..

Thank You Eddie what will be your strategy in simplifying: (x^2 - 9)/(x^2 - 3x) ?

I need some help answering this question. Thanks