Determine the standard form of the equation of the line that passes through -6x - 7y = 14
c.
6x + 7y = 14
b.
7x - 6y = -14
d.
-6x + 7y = -14

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?

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Extra points! find the missing dimension! need asap