exam Maths Puzzle Numerical Ability

There are pigs and chicken in the farm. The total no. of heads and legs of both animals is 100. How many pigs and chicken are there in the farm ?

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Hello. Could you please help me completly factor the following 3x^3y-12x^2y+9xy KATHY IS STACKING ENCYCLOPEDIA VOLUMES ON A LIBRARY BOOKSHELF. EACH VOLUME IS 2.5 INCHES WIDE. THE SELF IS 48 INCHES WIDE.

2.5x < 48

2.5x > 48

48x < 2.5

48x > 2.5