exam Maths Puzzle Numerical Ability

(-3) 3pie - (-8)(-2)

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exam Other Question

Calculate the range and the standard eviation for each set of numbers.

5,4,2,5,7,5,2,4,3,8,

The book does not give me clear directions can someone help me out.

Thanks I am doing solution of systems of equations, and i have to determine weather each system of equations has one solution, no solution, or many solutions. By graphing and if it has on