exam Maths Puzzle Numerical Ability

I need help please I am not sure but I believe the answer -6/0 which I believe is undefined. Am I right? Thanks so much for your help.
Perform the indicated operation.

14-20
_________

(4)(3)-12

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exam Other Question

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Write in slope-intercept form the equation of the line passing through (1,3) and (-5,-1). Show that this line is perpendicular to the line y=-3/2x+17. thanks Find the y-intercept.
-x + 3y = 15

A) (5, 0) B) (0, -15) C) (0, 5) D) (-15, 0)