book Maths Puzzle Numerical Ability

coin collection worth $2.90 contains nickels, dimes, and quaters. There are three times as many dimes as there are nickels, and the number of quarters is 2 more than the number of nickels

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book Other Question

5z^2-4z+1=0
z^2-4/5z+1/5=0z^2-2*2/5z+(2/5)^2-(2/5)^2+1/5=0
z^2-2*2/5z+(2/5)^2=-1/25 For the function,

Give the y values for x = -2, -1, 0, 1, 2, 3.
Answer:
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Using these points, draw a curve.
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