Answer: C
Step-by-step explanation:
x-3y=5, y=x-7 *solve it
the answer is (8,1)
so..
C. (8,1) is a solution to both equations so it is a solution to the system
Answer:
48 c
Step-by-step explanation:
if each hour it goes up by 6 c then all u need to do is add 6, 8 times (aka 6 times 8)
Answer:
![x = 8](https://tex.z-dn.net/?f=x%20%3D%208)
Step-by-step explanation:
1) Subtract 6 from both sides.
![3(x + 1) = 33 - 6](https://tex.z-dn.net/?f=3%28x%20%2B%201%29%20%3D%2033%20-%206)
2) Simplify 33 - 6 to 27.
![3(x + 1) = 27](https://tex.z-dn.net/?f=3%28x%20%2B%201%29%20%3D%2027)
3) Divide both sides by 3.
![x + 1 = \frac{27}{3}](https://tex.z-dn.net/?f=x%20%2B%201%20%3D%20%20%5Cfrac%7B27%7D%7B3%7D%20)
4) Simplify 27/3 to 9.
![x + 1 = 9](https://tex.z-dn.net/?f=x%20%2B%201%20%20%3D%209)
5) Subtract 1 from both sides.
![x = 9 - 1](https://tex.z-dn.net/?f=x%20%3D%209%20-%201)
6) Simplify 9 - 1 to 8.
![x = 8](https://tex.z-dn.net/?f=x%20%3D%208)
Therefor the answer is, x = 8.
0.52 because 52/100 is better than 52/1000 and 52/10000
The
for the matrix is
![A^{-1} = \left[\begin{array}{ccc}-1&-1&8\\1&0&-5\\0&1&-4\end{array}\right]](https://tex.z-dn.net/?f=A%5E%7B-1%7D%20%3D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-1%26-1%268%5C%5C1%260%26-5%5C%5C0%261%26-4%5Cend%7Barray%7D%5Cright%5D)
How to find inverse of a matrix ?
Only square matrices with an equal number of rows and columns, such as 2 *2, 3* 3, etc., allow us to find the inverse of the matrix. The adjoint of the provided matrix is divided by the determinant of the given matrix to produce the inverse matrix, to put it simply.
![A^{-1} = \frac{1}{|A|} Adj A](https://tex.z-dn.net/?f=A%5E%7B-1%7D%20%3D%20%5Cfrac%7B1%7D%7B%7CA%7C%7D%20Adj%20A)
|A|=-5(4-3)+4(4-3)-5(4-4)
|A|=-5+4
|A|=-1
![Adj A = \left[\begin{array}{ccc}1&1&-8\\-1&0&5\\0&-1&4\end{array}\right]](https://tex.z-dn.net/?f=Adj%20A%20%3D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%261%26-8%5C%5C-1%260%265%5C%5C0%26-1%264%5Cend%7Barray%7D%5Cright%5D)
![A^{-1} = \frac{1}{-1}\left[\begin{array}{ccc}1&1&-8\\-1&0&5\\0&-1&4\end{array}\right]](https://tex.z-dn.net/?f=A%5E%7B-1%7D%20%3D%20%5Cfrac%7B1%7D%7B-1%7D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%261%26-8%5C%5C-1%260%265%5C%5C0%26-1%264%5Cend%7Barray%7D%5Cright%5D)
![A^{-1} = \left[\begin{array}{ccc}-1&-1&8\\-1&0&-5\\0&1&-4\end{array}\right]](https://tex.z-dn.net/?f=A%5E%7B-1%7D%20%3D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-1%26-1%268%5C%5C-1%260%26-5%5C%5C0%261%26-4%5Cend%7Barray%7D%5Cright%5D)
To learn more about the inverse of a matrix from the given link
brainly.com/question/27144231
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