He rounded to the nearest thousand not the nearest percent. Please make me brainlest and have a good day
I would think it is round each amount to the nearest thousand dollars.
Remove parentheses
2/5 • d-10 - 2/3 • d+6
calculate
2/5d-4 - 2/3d-4
the answer
-4/15d-8
Answer:
Step-by-step explanation:
both angles must add up to 180 so
6x+12+3x+63 must =180
= 9x+75
9x+75=180
-75 -75
9x=105
x=11.66
meaning A is approximately 81.96
Answer:
Step-by-step explanation:
Given
![6x_1-9x_2=8](https://tex.z-dn.net/?f=6x_1-9x_2%3D8)
![9x_1+kx_2=-1](https://tex.z-dn.net/?f=9x_1%2Bkx_2%3D-1)
The given system is
can be represented by
![\begin{bmatrix}6 &-9 \\ 9 & k\end{bmatrix}\begin{bmatrix}x_1\\ x_2\end{bmatrix}=\begin{bmatrix}8\\ -1\end{bmatrix}](https://tex.z-dn.net/?f=%5Cbegin%7Bbmatrix%7D6%20%26-9%20%5C%5C%209%20%26%20k%5Cend%7Bbmatrix%7D%5Cbegin%7Bbmatrix%7Dx_1%5C%5C%20x_2%5Cend%7Bbmatrix%7D%3D%5Cbegin%7Bbmatrix%7D8%5C%5C%20-1%5Cend%7Bbmatrix%7D)
The given system is consistent when determinant of A is not equal to zero
![|A|](https://tex.z-dn.net/?f=%7CA%7C)
![|A|=6k-(-81)=6k+81](https://tex.z-dn.net/?f=%7CA%7C%3D6k-%28-81%29%3D6k%2B81)
![k\neq \frac{-27}{2}](https://tex.z-dn.net/?f=k%5Cneq%20%5Cfrac%7B-27%7D%7B2%7D)
i.e. system is consistent for all value of k except ![k=\frac{-27}{2}](https://tex.z-dn.net/?f=k%3D%5Cfrac%7B-27%7D%7B2%7D)
![R-\frac{-27}{2}](https://tex.z-dn.net/?f=R-%5Cfrac%7B-27%7D%7B2%7D)