exam Maths Puzzle Numerical Ability

please help

simplify

(3x^-2y)(2x^-3y^-2)

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exam Other Question

On a round trip of 700km in each direction,Mr.anderson averaged 7km/h more returning than he did going.If the return trip took 5hours less than the trip going, find the time he spent traveling in each direction Please assist me with the following,,,thank you
Donna and Sherman Terrel are preparing a budget for 2003. Donna is a systems analyst with an airplane manufacturer, and Sherman is