exam Maths Puzzle Numerical Ability

Find all or imaginary solution to the equation.
w^2=-225

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exam Other Question

Could you please determine whether the abosolute value inequality is equivalent to the inequality following it?

|x-3|>0,x-3>0

Also could you please give details?
Thank you very much. 1.
The rate, given that the distance is 200 feet and the time is x + 3 seconds.

2
the perimeter of a rectangle, given that length is x yards and the width is 10 yards shorter