exam Maths Puzzle Numerical Ability

4. Perform the indicated operations:
(5x2 - 3x + 2) + (-3x2 - 5x - 8) - (x2 + 3x - 10)

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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 =Pe^rt WHERE r IS EXPRESSED AS A DECIMAL. SOLVE THIS FORMULA FOR t IN TERMS OF A,P,AND r. How do you convert a fraction to a percent?