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anonymous
 one year ago
Question 38 of 165
Solve the system of linear equations below.
2x + y = 5
x + y = 4
x = 1, y = 3
x = 1, y = 5
x = 3, y = 1
x = 9, y = 5
anonymous
 one year ago
Question 38 of 165 Solve the system of linear equations below. 2x + y = 5 x + y = 4 x = 1, y = 3 x = 1, y = 5 x = 3, y = 1 x = 9, y = 5

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you can subtract the two equations, then the y term will disappear and then you can find x

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\left[\begin{matrix}2 & 1 \\ 1 & 1\end{matrix}\right]\left[\begin{matrix}x \\ y\end{matrix}\right]=\left[\begin{matrix}5 \\ 4\end{matrix}\right]\]\[A = (2 \times 1)  (1 \times 1 ) = 1\]\[A ^{1} = \left[\begin{matrix}1 & 1 \\ 1 & 2\end{matrix}\right]\]\[\left[\begin{matrix}1 & 1 \\ 1 & 2\end{matrix}\right]\left[\begin{matrix}5 \\ 4\end{matrix}\right]=\left[\begin{matrix}? \\ ?\end{matrix}\right]\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0do the matrix multiplication and find out :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0answer isnt that important its how you get there

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0noo im saying whats matrix multiplication

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1438777722519:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0im on question 103 now so....
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