book Maths Puzzle Numerical Ability

If 64 feet of rope weighs 20 pounds, how much will 80 feet of the same rope weights?

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#1
Graph and solve the system
y<-x2+4 (2 is x cubed,< is less than or equal to)
y>x-2 (> is greater than or equal to) Can you please let me know if I am correct.

(x-3)squared (y-2)squared
------------ + ------------- = 1
9 4

is this an ellipse?