exam Maths Puzzle Numerical Ability

Can you please factor out completely 2x^2+xy-6y^2?

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exam Other Question

Pipe A can fill a tank in 4 hr, Pipe B in 10 hrs and pipe C in 12 hrs. The pipes are connected to the same tank. How long does it take to fill the tank if all 3 are running together? Hello,
Please graph the funtion y=f(x) then graph the inverse function y=f^-1(x) on the same grid.

Thank you