Which of the following are valid names for the given triangle?

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.

The sum of two numbers is 86, and their difference is 20. find the two numbers

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.