exam Maths Puzzle Numerical Ability

A real number that is not rational?

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exam Other Question

when a plane flies into the wind, it can travl 3000 km in 6 hours. when it flies with the wind, it can travel the same distance in 5 hours. Find the rate of the plane in still air and the rate of the wind. How to convert a point into a point-slope, slope-intercept and standard form?
Ex: (6,1), (4,1)