exam Maths Puzzle Numerical Ability

Dave was to inherit 5x as much as Libby. Libby was to inherit 2/5 as much as Hector. The sum that would be shared was $102,000. How much will they each get?

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exam Other Question

Find the equation of the line passing through the points ( - 4, 8) and (5, -1).

Also find the equation of the straight line perpendicular to the line you find above and passing through the point ( -3, -8). Find the missing value.

Principle= $8200.00, Time= 2.5 years, Simple Interest=$3997.50, Rate=???

Please help

Ellen