Using the slope formula, find the slope of (1,-5) and (3,-17) pls pls help pls

Angle mno is s rotated 180 degrees counterclockwise about the origin to form angle m’n’o’. which statement shows the measure of angle m’n’o’?

Which best explains why this triangle is or is not a right triangle?

Square a has a side length of (2x-7) and square b has a side length of (-4x+18). how much bigger is the perimeter of square b than square a?and show all work! you so