exam Maths Puzzle Numerical Ability

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List the like terms in the following group of terms.
6x, -7wx2, 4w2x, 8wx2, -2wx2, -9w2

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exam Other Question

How do you simplify. It is under Problem Set 4.1 number 47. The coordinates of the vertices of a quadrilateral are R(-1,3), S(3,3), T(5,-1), and U(-2,-1). Find the perimeter of the quadrilateral. Round to the nearest tenth.