Please Simplify 648.1 + 89

Give all possible names for the line shown.calculation tip: lines can be written with either point first.

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 values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?