Solve the system of equations -2x+y=15−2x+y=15 and 3x+2y=-333x+2y=−33 by combining the equations.

Volume of cylinder with a radius of 8cm and height of 25 cm

Lorne subtracted 6x3 – 2x + 3 from –3x3 + 5x2 + 4x – 7. use the drop-down menus to identify the steps lorne used to find the difference.

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?