Idon't know how to do this can you me

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Is fgh ~ jkl? if so, identify the similarity postulate or theorem that applies.

Which expression is equivalent to 4 square root 6 divided by 3 root 2