The augmented matrix is
![\left[\begin{array}{ccccc|c}1&-2&3&2&1&10\\2&-4&8&3&10&7\\3&-6&10&6&5&27\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccccc%7Cc%7D1%26-2%263%262%261%2610%5C%5C2%26-4%268%263%2610%267%5C%5C3%26-6%2610%266%265%2627%5Cend%7Barray%7D%5Cright%5D)
Add -2(row 1) to row 2, and add -3(row 1) to row 3:
![\left[\begin{array}{ccccc|c}1&-2&3&2&1&10\\0&0&1&-1&8&-13\\0&0&1&0&2&-3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccccc%7Cc%7D1%26-2%263%262%261%2610%5C%5C0%260%261%26-1%268%26-13%5C%5C0%260%261%260%262%26-3%5Cend%7Barray%7D%5Cright%5D)
Add -1(row 2) to row 3:
![\left[\begin{array}{ccccc|c}1&-2&3&2&1&10\\0&0&1&-1&8&-13\\0&0&0&1&-6&10\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccccc%7Cc%7D1%26-2%263%262%261%2610%5C%5C0%260%261%26-1%268%26-13%5C%5C0%260%260%261%26-6%2610%5Cend%7Barray%7D%5Cright%5D)
Add row 3 to row 2:
![\left[\begin{array}{ccccc|c}1&-2&3&2&1&10\\0&0&1&0&2&-3\\0&0&0&1&-6&10\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccccc%7Cc%7D1%26-2%263%262%261%2610%5C%5C0%260%261%260%262%26-3%5C%5C0%260%260%261%26-6%2610%5Cend%7Barray%7D%5Cright%5D)
Add -3(row 2) to row 1, and add -2(row 3) to row 1:
![\left[\begin{array}{ccccc|c}1&-2&0&0&7&-1\\0&0&1&0&2&-3\\0&0&0&1&-6&10\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccccc%7Cc%7D1%26-2%260%260%267%26-1%5C%5C0%260%261%260%262%26-3%5C%5C0%260%260%261%26-6%2610%5Cend%7Barray%7D%5Cright%5D)
It’s the second one from the right
Since there’s a - behind x it means it has to be facing down so it’s either 2 or 4
Now it’s x-2 and we know that x moves the opposite so it needs to move 2 to the right so the answer is 2
<span>The majority of the scores on the in test are between 85 to 115. This makes the mean 100 and the standard deviation 15. Anyone who scores above or below this range is ether more intelligent or less intelligent then the majority of participants in the test. Since Clara scored 118 she is smarter than most of the adults on this study.</span>
I hope this helps you find the answer you're looking for
