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Derek and Tim run in a straight line. Their positions, d, with respect to the starting point, at t seconds, are modelled by the
Derek and Tim run in a straight line. Their positions, d, with respect to the starting point, at t seconds, are modelled by the following functions: Derek: d (t) = Tim:d (t) = t-8 t+1 At what time were Derek and Tim at the same position? a) t=5 seconds and t-2 seconds b) t=5 seconds c) t=2 seconds
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