exam Maths Puzzle Numerical Ability

A man and his brother have a combined age of 164 years. 46 years ago, the man was 7 times as old as his brother. How old is the man? How old is the brother?

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Hello,


I need help finding the equation of the axis of symmetry for the graph of y=x^2-7x+12, and help stating whether the axis of symmetry contains a maximum point of the graph.


Thank you how do i know when to use setbuilder notation or lnterval notation m+4>8