exam Maths Puzzle Numerical Ability

A 25 inch rope is cut into three pieces such that the middle sized piece is 1 inch longer than the short piece and the longest piece is twice as long as the short piece. How long i

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The budget deficit for Central City can be modeled by the equation
D = 0.5n + 6.5 where n is the number of years since 1990 and D is the deficit in millions of dollars.
Graph the equation for n ranging from 0 to 20. Write the equation of a line in standard form, passing through (-2,-3) and parallel to a line with the equation 3x-y=2