exam Maths Puzzle Numerical Ability

Find the slope of the line through the following pairs of points.
(-5, -3) and (-5, 2)

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exam Other Question

y=1/3x+1/2

Determine if the lines are parallel, perpendicular, or neither. I am suppose to simplify can you help?
Do I factor? There is no book
x^2 = 2x - 15
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x^ - 9
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x^2 + 6x +5
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x^2 + 4x + 3
thanks,