exam Maths Puzzle Numerical Ability

A bunch trotted m miles at z miles per hour and arrived 3 hours late. How fast should they have trotted to have arrived on time?

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Analysis of forecasters’ interest rate predictions over the period 1982–1990 was intended to see
whether the predictions corresponded to wh
1.Where do you use cramer's rule
2.Why would you want to use cramer's rule
3. The meaning of determinant