Using this input and output machine, f(x) = ? x/6 + 12

x/3 * 2 - 12

x/6 * 2 - 24

x/6 - 12

Me because some of question i don’t understand

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

What line represents the relationship between r and s