exam Maths Puzzle Numerical Ability

Are the following pairs of lines parallel, perpendicular, or neither?
L1 with equation x+2y=4
L2 with equation 2x+4y=5

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exam Other Question

cedric wants to buy one of four diffrent kinds of new shoes. each brand of shoe is avalible in two colors, black and white. how many diffrent shoe choices does cedric have?
i hope you can help
thanks a bunch! Please help me with this problem.
√(98x^3)