exam Maths Puzzle Numerical Ability

Can u explain how to do this problem. Step by step.

x over 4 - 9= 9;36

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exam Other Question

Determine the measure of side b, given the following informaiton for triangle ABC:
c=59ft, A=65degrees, B=65degrees
a fenced yard with a lenght of 110 feet and width of 65 feet.
Thanks Tutor.