Mathematics, 06.10.2019 13:00 ayoismeisalex
Which expression gives the y-coordinate of the solution of the system? 3915518_eqn011.gif
Answers: 1
![D =\left[\begin{array}{ccc}a&b&c\\d&e&f\\g&h&i\end{array}\right]](/tpl/images/0293/6832/e0a44.png)
![D_{y} =\left[\begin{array}{ccc}a&j&c\\d&k&f\\g&l&i\end{array}\right]](/tpl/images/0293/6832/8bc64.png)
![D=\left[\begin{array}{ccc}1&2&-2\\3&-1&1\\1&0&1\end{array}\right] \\D=1(-1-0)-2(3-1)-2(0+1)\\D=-1-4-2\\ D=-7](/tpl/images/0293/6832/e3423.png)
![D_y=\left[\begin{array}{ccc}1&3&-2\\3&16&1\\1&7&1\end{array}\right] \\ D_y=1(16-7)-3(3-1)-2(21-16)\\ D_y=9-6-10 \\D_y=-7](/tpl/images/0293/6832/a02cc.png)
![OptionD=\frac{\left[\begin{array}{ccc}1&3&-2\\3&16&1\\1&7&1\end{array}\right] }{-7}](/tpl/images/0293/6832/2f561.png)
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Which expression gives the y-coordinate of the solution of the system? 3915518_eqn011.gif...
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