Mathematics, 01.07.2019 04:50 williampagan9532
Use cramer's rule to solve the following system: –2x – 6y = –26 5x + 2y = 13
Answers: 1
![\left[\begin{array}{ccc}a_1&b_1\\a_2&b_2\end{array}\right] \left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}c_1\\c_2\end{array}\right]](/tpl/images/0037/4513/89ff6.png)
![\left[\begin{array}{ccc}-2&-6\\5&2\end{array}\right] \left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}-26\\13\end{array}\right]](/tpl/images/0037/4513/4c54c.png)
![x= \frac{ \left[\begin{array}{ccc}c_1&b_1\\c_2&b_2\end{array}\right] }{ \left[\begin{array}{ccc}a_1&a_2\\b_1&b_2\end{array}\right] } = \frac{c_1b_2-b_1c_2}{a_1b_2-a_2b_1}](/tpl/images/0037/4513/c3be8.png)
![x= \frac{ \left[\begin{array}{ccc}-26&-6\\13&2\end{array}\right] }{ \left[\begin{array}{ccc}-2&-6\\5&2\end{array}\right] } = \frac{(-26)(2)-(-6)(13)}{-2)(2)-(-6)(5)} = \frac{26}{26}=1](/tpl/images/0037/4513/cbd05.png)
![y= \frac{ \left[\begin{array}{ccc}a_1&c_1\\a_2&c_2\end{array}\right] }{ \left[\begin{array}{ccc}a_1&b_1\\a_2&b_2\end{array}\right] } = \frac{a_1c_2-a_2c_1}{a_1b_2-a_2b_1}](/tpl/images/0037/4513/823a4.png)
![y= \frac{ \left[\begin{array}{ccc}-2&-26\\5&13\end{array}\right] }{ \left[\begin{array}{ccc}-2&-6\\5&2\end{array}\right] }= \frac{(-2)(13)-(5)(-26)}{(-2)(2)-(-6)(5)}= \frac{104}{26}=4](/tpl/images/0037/4513/e4462.png)
Other questions on the subject: Mathematics
Mathematics, 21.06.2019 13:50, daytonalive7193
Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean
Answers: 2
Mathematics, 21.06.2019 20:00, ZaneKun
Need ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?
Answers: 1
Mathematics, 22.06.2019 01:30, heidiallen565
Arace is 10 kilometers long. markers will be placed at the beginning and end of the race course and at each 500 meter mark. how many markers are needed to mark the course for the race?
Answers: 3
Mathematics, 22.06.2019 02:00, coolkitty35
Arectangular courtyard is 12 feet long and 8 feet wide. a tile is 2 feet long and 2 feet wide. how many tiles are needed to cover the courtyard?
Answers: 1
You know the right answer?
Use cramer's rule to solve the following system: –2x – 6y = –26 5x + 2y = 13...
Questions in other subjects:
Biology, 20.01.2022 03:40
Chemistry, 20.01.2022 03:40
Mathematics, 20.01.2022 03:40
