While making a non-stop trip, a bus averaged \(m\) mph for the first \(5\) hours and \(n\) mph, for the remaining \(4\)

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While making a non-stop trip, a bus averaged \(m\) mph for the first \(5\) hours and \(n\) mph, for the remaining \(4\) hours. What was the average speed of the bus, in mph, for the whole trip?

1) \(7.5m + 6n = 465\)
2) \(2m + 3n = 180\)

The OA is A