exam Maths Puzzle Numerical Ability

Factor completely:

-2x to 3rd power + 16x to 2nd power - 24x

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exam Other Question

Jackie mows a strip of uniform width around her 25m by 15m rectangular lawn and leaves a patch of lawn that is 60% of the original area. What is the width of the strip? Currently you have $80.00 and your sister has $145.00. You decide to save $6.00 of your allowance each week, while your sister decide to spend her whole allowance plus $7.00 each week. How long will it be before you have as much money as your sister.