exam Maths Puzzle Numerical Ability

Are the following lines parallel, perpendicular, or neither?
L1 with equation x-2y+10
L2 with equation 2x+y=2

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exam Other Question

Give the coordinates of three points that form a triangle, what formula must be used to determine if the triangle is equilateral? Q1. (x-1)(x-2)(x^2-9x+14)/(x-7)(x^2-3x+2)