exam Maths Puzzle Numerical Ability

please help me sovle this question (y-24=-7)

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The speed of a passenger train is 14 mph faster than the speed of a feight train. The passenger train travels 400 mi in the same time that it takes the freight train to travel 330 mi. Find the speed of each train. Use the ac test to determine which of the following trinomials can be factored. Find the values fo m and n for each trinomial that can be factored.

x^2 - 3x + 7