exam Maths Puzzle Numerical Ability

Graph y >- 3 - x

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exam Other Question

If f (x) = 5x � 1, find the following:

9. f (a -2) Two trains leave the depot at the same time, one traveling east and the other west. The speed of one train is 9mph slower than the other. If after 4 hours the distance between the trains is 196 miles find the speed of each train.