What is the sum of 7x/(x^2-4) and 2/(x+2)​

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?

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

5x−4≥12 or 12x+5≤−4 can you with this problem