The coordinates of the vertices of are p(-4,1), q(-1,2), and r(-3,-2). determine whether is a right triangle. you for your time.

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?

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?