exam Maths Puzzle Numerical Ability

Find an expression theat represents the perimeter.

Side 1 = 3 OVER 4x
Side 2 = 1 OVER x squared
Side 3 = 5 OVER x squared

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exam Other Question

the sum of the ages of the father has a slope of 3 and passes through the point (3,1). find the solution. From a point on a river, two boats are driven in opposite directions, one at 10 miles per hour and the other at 6 miles per hour. In how many hours will they be 32 miles apart?

If anyone could help that would be great!
thanks