Sheena is tocking a shelf with bags of four that weigh sa pounds each if sheena stocks the shelf with 13 60gs of four. Find the combined weight of the 13 bags

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 each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

What is y-5=3(x+1) in slope intercept form