exam Maths Puzzle Numerical Ability

two trains leave Dallas at 9:00am The eastboud train travels at 45mi/h. the westbound train travels at 60 mi/h. at what time will the two trains be 420 mi apart ?

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exam Other Question

frederique is two years older than her brother. 12 years ago she was twice as old as he was. How old are they now? Perform the indicated operations:
(x2 � 11x + 4) � (-2x2 + 2x � 6) � (x2 + 6x � 5)