Solve The Following equation By Matrix Inversion method: x+y+z=6
3x-y+3z=6
5x+5y-4z=3

#Kindly Don't Espam!!

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?