exam Maths Puzzle Numerical Ability

Simplify:

{(a+5)/a}*{a^2/(a^2-25)}

Thanks!
Matt

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exam Other Question

What do you set the equation equal to when you are looking for the measure of an angle in a circle? example: what would the angle equal if the equation was: 15x+3 would I set it equal to 360 or what or what if the equation were just 4x if a football player is 1.7ft short of the end zone how many more yards you need to make a touchdown