Due tmmr for big grade pls helppp

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?