exam Maths Puzzle Numerical Ability

Graph the system of linear inequalities.

x-y <5
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3x + y > 4
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exam Other Question

I have been having trouble on this problem for awhile now and I was wondering if anyone could help me? Please and Thank You!! I would deeply appreciate it!

Factor completely. check for a greatest common factor first.
X^8-1
My algebra worksheet says to Express each polynomial as the product of its greatest monomial factor and another polynomial.

One of the problems is: 9x^2y - 27xy^2