exam Maths Puzzle Numerical Ability

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.

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exam Other Question
Simplify (2 radical 3 + 5 radical 5) ( 3 radical 3 - radical 5) The ration of an angle to its supplement is 3:7. Find the ratio of the angle to its complement.