exam Maths Puzzle Numerical Ability

Tutor Can you help me in determining whether the function is even, odd or neither even or odd?

f(x)=x-|x|

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exam Other Question

A ball is thrown upward from the roof of a building 100 m tall with an initial velocity of 20 m/s.

When will the ball reach a height of 80m?

I would appreciate help with this one. Thank you! I am having a hard time dividing this rational expression: PLEASE HELP!

6p-18 over 9p divided by 3p-9 over p^2+2p

Thanks in advance!
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