State what additional information is required in order to know that the triangles are congruent for the reason. PLZ SOME 1 HELP

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?

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

How do your peer relationships affect your overall health status? what can you do to improve your peer relationships?