exam Maths Puzzle Numerical Ability

y - x > -3

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exam Other Question

Multiply or divide as indicated. Write the answer in lowest terms.

9x^2-16
over
x^2-1

divided by

3x-4
over
x+1 How many liters of a 10% alcohol solution must be mixed with 40 L of a 50% solution to get a 40% solution?