Identify the expression equivalent to 2x + 8 by substituting x = 7 and x = 5. a. 2x+10+10 b. 2(x+2) c. (x+4) + (x+4) d. (x+4) e. 2(2x+4)

Find the x coordinate of the point.

Lorenzo ate 2/5 of his bag of almonds. his 4 friends ate equal shares of the remaining bag of almonds?

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?