exam Maths Puzzle Numerical Ability

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write the equation of the parabola in standard form given the following properties.
focus: (-5/2,0)
directrix x= -4

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hey could you please help me out with this permutation problem:

P(n,5)=20P(n,3) Hello out there,I need some help with some problems,the first one is,Solve the inequality:x-3<5.The next one is,Solve the inequality:y+4>-2.The third one is,Write an inequality to