Express each ratio as a fraction in the simplest form 10 dimes out of 18 coins

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?

Solve 3x-18=2y and 5x-6y=6 by elimination show work

Find the nonpermissible replacement for binthis expression.b2/5b +5