What numbers would equal 16 in multiplication but equal 7 in addition

Two lines parallel to a third line are parallel to each other. always sometimes or never

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?

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?