The dimensions of a rectangle are given in terms of S as shown below or above. Q. Which expression represents the perimeter of the rectangle? Mark all that apply.

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Solve: 3x+y=6 4x-2y=18 show all work !

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show