This is a set question so please answer them all (A) A rectangular floor has an area of (x^2 + 13x + 40) m^2 . If the width is (x + 5) m, how long is it if the actual width is 12 m? (B) How many tiles of 1 m by 1m would be needed to cover the floor? (C)If Mr. Santos bought 10 boxes of 1 m by 1 m tile and each box contains 20 pieces of tiles, how many excess would there be if there is any?

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