Write the quadratic as a product of factors irreducible over the reals. x2 + 16 (x + 4)(x - 4) (x + 4i)(x - 4i) (x + 4i)2 (x + 4)2

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?

Are the corresponding angles congruent? explain why or why not.

Opposite angles in a parrellelogram are