If ƒ( x ) = x 2 + 1 and g( x ) = 3 x + 1, find 2ƒ(1) + 3g(4).

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?

Which of the following graphs could represent a cubic function?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?