exam Maths Puzzle Numerical Ability

Please help
1/y^2-1 over 1+1/y

Read Solution (Total 0)

exam Other Question

How many liters of pure antifreeze must be added to 20 liters of a solution that is 25% antifreeze to obtain a 50% solution? Tried using the given formula from teacher but get a negative 10 answer??
.25(20)= .50(20+x) Can you please help me solve using the quadratic equation?

x^2 + 2x - 24 = 0