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A father was three time as old as his son fifteen years ago and four times as old as his son nineteen years ago. When...

A father was three time as old as his son fifteen years ago and four times as old as his son nineteen years ago. When was the father twice as old as the Son?

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sharon kalunda answered the question on August 13, 2019 at 06:37

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Next: Find the equation of the normal to the curve y = 3x² – 9x at the point (2, - 6).

Previous: In the figure below, if ACB= 50°, AFB= 35° and FC is parallel to AD.

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