Expand the following:

3(x + 5)
4 ( x - 4)
2 (5x + 1)

Name these type of angles shown check all that applies

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?

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?