exam Maths Puzzle Numerical Ability

Please help. How do I determine ratios.

Ed and Dave are going to divide a cash prize of $14,000 in a ratio of 2 to 5. How much will Dave receive?

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exam Other Question

Translate to an algebra statement; do not solve:
Three times the sum of a number and seven yields the same result as the twice the same number decreased by four. Find the equation of the parabola whose focus is (2,3) and directrix is x=12.