Solve the system. 6x – 2y + z = -2
2x + 3y- 3z = 11
x + 6y = 31
Enter your answer as an ordered triple.
([?],[ ], [ ]

Aline passes through the two given points. is it vertical , horizontal , or neither ? (5, 2), (-5, -2)

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?