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Florian Weimer · Answer 1 · 2016-01-23T09:59:10+0000

(42 x⁵ y⁴ miles) / (6 x y² hours) =

(42) · (x⁵) · (y⁴) / (6) · (x) · (y²) =

(42/6) · (x⁵/x) · (y⁴/y²) =

(7) · (x⁴) · (y²) = 7 x⁴ y² miles per hour.

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