book Maths Puzzle Numerical Ability

It takes Jim 6 hours longer to fly the 1125 miles from Montreal, Canada to Birmingham, Alabama, in his Piper Cub than it does in his jet. If his average speed in the jet is 3 times that in the Piper Cub, What is the average speed of the Piper Cub? __mph

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Can you please help me with these few problems? Thank you very much for your timeand help!

{{{x=2y-4=0}}}
{{{6x-5y+20=0}}}
{{{-2x=2y+5}}} Determine the vertices and foci of the hyperbola.
64x^2 - 384x - 9y^2 - 54y= -479