Mathematics, 12.07.2019 08:30 daphnevlogs11
Use cramer's rule to solve the following system: –2x – 6y = –26 5x + 2y = 13 a. (–1,3) b. (1,4) c. (–4,–5) d. no unique solution
Answers: 1
![x=\displaystyle\frac{det\left[\begin{array}{cc}-26&-6\\13&2\end{array}\right]}{det\left[\begin{array}{cc}-2&-6\\5&2\end{array}\right]}=\frac{(-26)(2)-(13)(-6)}{(-2)(2)-(5)(-6)}\\\\=\frac{26}{26}=1\\\\y=\frac{det\left[\begin{array}{cc}-2&-26\\5&13\end{array}\right]}{26}=\frac{(-2)(13)-(5)(-26)}{26}\\\\=\frac{104}{26}=4](/tpl/images/0080/2955/12dcf.png)
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Use cramer's rule to solve the following system: –2x – 6y = –26 5x + 2y = 13 a. (–1,3) b. (1,4) c....
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