exam Maths Puzzle Numerical Ability

divide (45x^3+20x^2)/5x

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exam Other Question

The amount A in an account after t years from an initial principle P invested at an annual rate r compounded continuously is given by A=Pert where r is expressed as a decimal. Solv Find values for m and b in the following system so that the solution to the systemis (-3, 4).
5x + 7y = b
mx + y = 22