exam Maths Puzzle Numerical Ability

Simplify:

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

Thanks!
Matt

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exam Other Question

a right triangle has hypotenuse with a measure of 20 cm and a perimeter of 47cm. find the measure of the remaining sides. May I have some help with the following problem?

Suppose that each point in the coordinate plane is shifted 4 units to the right and 3 units upward.

(a) What point is shifted to (1, 3)?

(b) The point (a, b) is shifted to what new point?