exam Maths Puzzle Numerical Ability

please help me to solve this problem: Given the points P(-1,-2) Q(4,2) and R(1,m) in the coordinate plane. find the value of m so that PR + PQ is minimum.
thanks!!!

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exam Other Question

Solve the indicated variable.
Area of a Trapezoid
Solve for b1:
A= 1/2h(b1 + b2)
Solve the equation

16/7x/2/35x