exam Maths Puzzle Numerical Ability

solve using the quadratics formula

15nSQUARED-3n=4n

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exam Other Question

An aircraft carrier made a trip to Guam and back. The trip there took three hours and the trip back took four hours. It averaged 6 km/h on the return trip. Find the average speed o Divide.

x^2-25y^2/5x^2+25y divided by (x^2-5xy)

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