Exam Maths Puzzle Algebra

How do you go about the process of multiplying polynomials by monomials for example.
2(n-3)+n(2-n)=2-n^2

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Exam Other Question

How to get the angles inside of a circle which has the arc degrees given. None of the cars finished the race here is what happened car A broke 1/9th into last 3rd of race. How far did car A go?car B completed the first 1/2 of 13/16th of the race how far did car B go? car C broke with 1/3 left of race, how far did car C go? car D broke with 1/5 of the last 5th of race completed, how far did D go? car E went 1/2 as far as car B how far did car E go? Car F went 2/3 as far as car B how far did car f go? Who went the farthest? who went the shortest.