exam Maths Puzzle Numerical Ability

Hi May I have some help with this inequality?

Solve the inequality. Express the solution using interval notation.


abs((x-1)/9) < 2

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exam Other Question
Graphing function :

f(x)= (2x)/(x^2+5x+4)


Please help.. I have no idea! THANK YOU!!! find a number whose square is 36 greater than 5 times the number.