Choose the student who combined like terms correctly to write an equivalent expression. 5 + c + c + c – 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?

What is the graph of the absolute value equation ? y=|x|-5

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.