Is negative square root 2 ration or irrational

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.

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Through non-collinear points there is exactly one plane.