exam Maths Puzzle Numerical Ability

Simplify and write with positive exponents 9x ( x^-3) / 18 x^15.

Thank you for your help.

Gabriel

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exam Other Question

Can someone do this for me?

simplify. radical*80 - radical*5 Simplify and reduce to lowest terms

(sqrt)16/(sqrt)32

and

(sqrt)8+(sqrt)32