![\left[\begin{array}{cc}2&-2\\-1&3\end{array}\right] \cdot \left[\begin{array}{c}x\\y\end{array}\right] = \left[\begin{array}{c}-18\\13\end{array}\right]](/tpl/images/0123/0528/46c31.png)
![\left[\begin{array}{cc}2&-2\\-1&3\end{array}\right]](/tpl/images/0123/0528/294d4.png)
![\left|\left[\begin{array}{cc}2&-2\\-1&3\end{array}\right]\right|=2\cdot 3-(-1)\cdot (-2)=6-2=4](/tpl/images/0123/0528/b08f3.png)
![\dfrac{1}{4}\left[\begin{array}{cc}3&1\\2&2\end{array}\right]^T=\dfrac{1}{4}\left[\begin{array}{cc}3&2\\1&2\end{array}\right]](/tpl/images/0123/0528/beb3f.png)
![\left[\begin{array}{c}x\\y\end{array}\right]=\dfrac{1}{4}\left[\begin{array}{cc}3&2\\1&2\end{array}\right]\cdot \left[\begin{array}{c}-18\\13\end{array}\right]=\\ \\=\dfrac{1}{4}\left[\begin{array}{cc}3\cdot(-18)+2\cdot 13\\1\cdot (-18)+2\cdot 13\end{array}\right]=\dfrac{1}{4}\left[\begin{array}{c}-28\\8\end{array}\right]=\left[\begin{array}{c}-7\\2\end{array}\right]](/tpl/images/0123/0528/7f1ba.png)
Solve the matrix equation by using inverse matrices.
[2 -2] * [x] = [-18]
[-1 3] * [y] =...
Mathematics, 23.07.2019 10:10 maggiemae4993
Solve the matrix equation by using inverse matrices.
[2 -2] * [x] = [-18]
[-1 3] * [y] = [13 ]
Answers: 3
Another question on Mathematics
Mathematics, 21.06.2019 13:30
Which point is a solution to the inequality shown in this graph (-3,-3)(3,-1)
Answers: 2
Mathematics, 21.06.2019 14:30
All per-unit concepts rely on ratios,meaning,to provide a type of measurement
Answers: 3
Mathematics, 21.06.2019 21:30
Two rectangular prisms have the same volume. the area of the base of the blue prism is 418 4 1 8 square units. the area of the base of the red prism is one-half that of the blue prism. which statement is true?
Answers: 3
Mathematics, 22.06.2019 00:00
Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read
Answers: 3
You know the right answer?
Questions
Mathematics, 07.04.2021 17:00
Mathematics, 07.04.2021 17:00
Mathematics, 07.04.2021 17:00
Mathematics, 07.04.2021 17:00
Mathematics, 07.04.2021 17:00
Biology, 07.04.2021 17:00
Business, 07.04.2021 17:00
Mathematics, 07.04.2021 17:00
Mathematics, 07.04.2021 17:00
Mathematics, 07.04.2021 17:00
Mathematics, 07.04.2021 17:00
Mathematics, 07.04.2021 17:00
