An algebraic contains and equal sign?

If you shift the linear parent function, f(x)=x, up 13 units, what is the equation of the new function?

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

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?