exam Maths Puzzle Numerical Ability

Line A goes through the points (2, #) and (-4, 21). Line B goes through the points (4, -1) and (10, 1). Are these two lines parallel, perpendicular, or neither?

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exam Other Question

Please explain the similarity between radicals and rational exponet notation.
please provide at least 2 examples of mathamatical notation or wording denoting the same process Divide.

x^2=2x-15/4x^2 / x^2-25/2x-10

Thank you!