exam Maths Puzzle Numerical Ability

the total value of the pennies and nickels was $14.50. hala counted the coins and found there was 450 in totalin all. how many of each type of coin did she have.

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If x = 10, the number 3,425 could be expressed as 3x^3 + 4x^2 + 2x + 5 and the number 215 could be expressed as 2x^2 + x + 5. If I divide 3,425 by 215 it will be equivalent to div what are the three types of linear systems