exam Maths Puzzle Numerical Ability

Simplify and reduce:
-x+9/x^2-9+2/x+3
I came up with :
x+6/(x-3)(x+3)
Is this correct???

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exam Other Question

Find the slope and the y-intercept.
y = 4x - 3

Please help I have to resolve this by graphing the equations in six different ways. Here they are to see if I am doing them right.
4x+3y=>24
3x+4y=>8
x=>0
y=>0

First I need to eliminat