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Vlad1618 [11]
3 years ago
6

What is |Ay| in the system of linear equations below? -8x+y=6 3x-2y=-1

Mathematics
2 answers:
Nataliya [291]3 years ago
6 0

A=\left[\begin{array}{ccc}-8&1\\3&-2\end{array}\right]\\\\|A_y|=\left|\begin{array}{ccc}-8&6\\3&-1\end{array}\right|=(-8)(-1)-(3)(6)=8-18=-10

sergiy2304 [10]3 years ago
4 0

Answer:

|Ay| = - 10

y = 10/19

x = 2 - 10/57

Step-by-step explanation:

we have to set the data into array format to be able to solve the problem.

A=\left[\begin{array}{ccc}-8&1\\3&-2\end{array}\right]\\\\|A_y|=\left|\begin{array}{ccc}-8&6\\3&-1\end{array}\right|=(-8)(-1)-(3)(6)=8-18=-10

but then to calculate for the values of x and y we solve simultaneously

-24x + 3y = 18

-24x - 16y = 8

19y =10

y = 10/19

substituting the value of y

3x + 10/19 = 6

3x = 6-10/19

x = 2 - 10/57

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