exam Maths Puzzle Numerical Ability

2a+15 over a^2-7a+12 - 11a over a^2-7a+12 =

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exam Other Question

A waitress wants to cut a pie into twelve equal slices.

At what angle should she cut the sides of piece?
Thank you guys in advance your help is very much appreciated. I stumped on how to figure out the linear functun on this problem. Also I think I answered the rest of the problem cou