exam Maths Puzzle Numerical Ability

Graph 0.5x^2-3




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exam Other Question
Jan can run at 7.5 m/s and Mary at 8.0 m/s. On a race track Jan is given a 25 m head start, and the race ends in a tie. How long is the track? 12-4h=-18+11h
-6=7h
h=-6/7