Pemdas
(-10 + 2²) + 12

What is the solution to the system of the equations? x = y - 3 x + 3y = 13

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 equation represents the function on the graph?