exam Maths Puzzle Numerical Ability

solve the system
7x+3y=-2
-7x-7y=14

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exam Other Question

Perform the indicated operation

11-6/7-7 (This is a fraction.)

Would this one also be undefined?? What is the future value of a 5 year annuity due that promises to pay you $300 each year? Assume that all payments are reinvested at 7 percent a year, until year 5.