Which set of measurements represents the lengths of an isosceles triangle

3,4,5
13,13,26
27,27,44
18,18,38

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.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount