exam Maths Puzzle Numerical Ability

x^2+3x+1
_________
x-3

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exam Other Question

Find:
sin A if cos A = -(3/5) and 90 degrees < A < 180 degrees
The bottom of a 13-foot long ladder is placed 5 feet away from a wall so that the ladder rests against the top. Assuming the wall is perpendicular to the ground, what is the height of the wall?