exam Maths Puzzle Numerical Ability

9-3|2t-4|=3

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exam Other Question

A question on domains with a natural logarithm. Here is it:

g(x) = ln(x+4)

It seems to me that the domain would be: (-4, +infinity).
A mother is 25 years older than her daughter. Ten years ago, the daughter is 4/9 of the age of the mother was then. Find the age of each.