Factor the trinomial x^2-13x+40

The parabola opens: y=√x-4 (principal square root) up down right left

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Plz.yesterday, the snow was 2 feet deep in front of archie’s house. today, the snow depth dropped to 1.6 feet because the day is so warm. what is the percent change in the depth of the snow?