exam Maths Puzzle Numerical Ability

Ruth invests $10,000 in two accounts. One account has an annual interest rate of 7%, and the other account has an annual interest rate of 5%. Let I represent the total interest ear

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exam Other Question
If A is a square matrix with the property (A with an exponet of 2) = 0, show that (I - A)inverse = A + I.


Thank you Rewrite the expression with positive exponents:

3a^-3

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