2) Calcule a soma das fraçars: a) 213 + 713
D) 1/2 + 4/5
c) 5/6 +12
d) 915 +4.
e) 213 +315+5/7​

The table shows the distance traveled over time while traveling at a constant speed.

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?

Find the value of x for which the lines are parallel.