Pretty sure that both A and B are correct
Answer:
Step-by-step explanation:
how stressed are you? if it goes up that means you are more stressed if it goes down you are less stressed for example mine would be the 3rd answer because my week has been pretty normal. someone who just started school and has a lot of work might be the 1st one. my explanation would be i have gotten somewhat stressed due to school but not too much. elaborate more than me tho lol hope this helps :)
Answer:
The answer is 7 because if we write 7 - 8 = -1, then we could see that the answer would be -1 since 7 is 1 value lower than 8, and 8 - 8 = 0, so if 7 is lower than 8 by 1, then you would go one value lower from 0, which is -1. You can also figure this out by looking at a number line and starting from 7 and then going backwards 8 times and whatever number you land on after going back 8 times is your answer.
Answer:
![x=-1223,y=-629,z=-31](https://tex.z-dn.net/?f=x%3D-1223%2Cy%3D-629%2Cz%3D-31)
Step-by-step explanation:
The given systems of equations is
![x-2y+z=4](https://tex.z-dn.net/?f=x-2y%2Bz%3D4)
![3x-5y-17z=3](https://tex.z-dn.net/?f=3x-5y-17z%3D3)
![2x-6y+43z=-5](https://tex.z-dn.net/?f=2x-6y%2B43z%3D-5)
The augmented matrix is
.
We perform the following row operations to reduce the matrix to reduced row echelon form using row 1 as our pivot row.
![R_2-3R_1\rightarrow R_2](https://tex.z-dn.net/?f=R_2-3R_1%5Crightarrow%20R_2)
![R_3-2R_1\rightarrow R_3](https://tex.z-dn.net/?f=R_3-2R_1%5Crightarrow%20R_3)
![\left[\begin{array}{cccc}1&-2&1&|\:\:\:\:\:\:\:\:\:\:4\\0&1&-20&|\:\:\:\:-9\\0&-2&41&|-13\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7D1%26-2%261%26%7C%5C%3A%5C%3A%5C%3A%5C%3A%5C%3A%5C%3A%5C%3A%5C%3A%5C%3A%5C%3A4%5C%5C0%261%26-20%26%7C%5C%3A%5C%3A%5C%3A%5C%3A-9%5C%5C0%26-2%2641%26%7C-13%5Cend%7Barray%7D%5Cright%5D)
Next, we perform the following row operations using row 2 as our pivot row to obtain,
![R_1+2R_2\rightarrow R_1](https://tex.z-dn.net/?f=R_1%2B2R_2%5Crightarrow%20R_1)
![R_3+2R_2\rightarrow R_3](https://tex.z-dn.net/?f=R_3%2B2R_2%5Crightarrow%20R_3)
![\left[\begin{array}{cccc}1&0&-39&|-14\\0&1&-20&|\:\:-9\\0&0&1&|-31\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7D1%260%26-39%26%7C-14%5C%5C0%261%26-20%26%7C%5C%3A%5C%3A-9%5C%5C0%260%261%26%7C-31%5Cend%7Barray%7D%5Cright%5D)
Next, we perform the following row operations using row 3 as our pivot row to get,
![R_1+39R_3\rightarrow R_1](https://tex.z-dn.net/?f=R_1%2B39R_3%5Crightarrow%20R_1)
![R_2+20R_3\rightarrow R_2](https://tex.z-dn.net/?f=R_2%2B20R_3%5Crightarrow%20R_2)
![\left[\begin{array}{cccc}1&0&0&|\:-1223\\0&1&0&|\:\:\:\:-629\\0&0&1&|\:\:\:\:\:\:-31\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7D1%260%260%26%7C%5C%3A-1223%5C%5C0%261%260%26%7C%5C%3A%5C%3A%5C%3A%5C%3A-629%5C%5C0%260%261%26%7C%5C%3A%5C%3A%5C%3A%5C%3A%5C%3A%5C%3A-31%5Cend%7Barray%7D%5Cright%5D)
The matrix is now in the reduced row echelon form,
Therefore the solution is,
![x=-1223,y=-629,z=-31](https://tex.z-dn.net/?f=x%3D-1223%2Cy%3D-629%2Cz%3D-31)
It would be right 2, up three since whatever is in the parenthesis is the opposite of what you would think it is but the outside number of positive goes up but if negative goes down