book Maths Puzzle Numerical Ability

graph (Show your work)
y=16-x^2
Thanks a bunch

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book Other Question

absolute value of: s/3 + 6 and then - 8 greater than -5.

I cannot obtain the solution - pls help.

One other question, please:

solve and show on the number line the followi solve for all unknown variables:
RmTm=RrTr ... these are what they give you... Rm=8, Rr=2, Tr=5-Tm