exam Maths Puzzle Numerical Ability

i need help on 7x-3y+3z-2 and i need to show my work

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Please help me solve this problem:

How far up and down will a ball travel before stopping if it is dropped from a height of 12m, and each rebound is 1/3 of the previous distance?

Thank you. Please help me compute:

f(x)=25-7x g(x)=13 h(x)= x^2 +22x

g(f(5))

Thanks