Solve this system of equations using the addition method.
4a - 5b = 7
4a + 5b = 17
type the correct answer in ordered pair form

Acertain standardized? test's math scores have a? bell-shaped distribution with a mean of 520 and a standard deviation of 105. complete parts? (a) through? (c)

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.