exam Maths Puzzle Numerical Ability

for each pair of equations, determine if the lines are parallel, perpendicular, or neither.

y-3x=10 and 3y+x = -5

I have no idea how to start. Thank you.

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exam Other Question
Find the perimeter or circumference, and the area of a square with side 2 ft. 3 in. (-6*x^-2*y)^-2

(9x^6)^3/2

log( base 7) (square root of 7)

log(.1)