Line ab contains points a(8,-4) and b(1,-5). the slope of line ab is ? ?

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?

Which of these triangle pairs can be mapped to each other using two reflections?

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76