When evaluating a control chart, which of the following is not a warning signal that a random variable x is out of control?
a. there is a point above the upper control limit (ucl).
b. all the points are on one side of the center line
c. there is a point below the lower control limit (lcl)

Ten times the square of a non-zero number is eqaul to ninety times the number

Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)

Three students each examine the system of linear equations shown. 8x + 4y = 16 8x + 2y = 8 caleb says there is exactly one solution. jeremy says there is no solution. kim says there are infinitely many solutions. which student is correct? provide mathematical reasoning to support your answer. answer in complete sentences. : d