X+2y=5 x-3y=7 what is the second row of entries for the system determinant? a)1,-3 b)2,-3 c)5,7

A)1,-3

Step-by-step explanation:

X+2y=5

X-3y=7

To write a determinant we take the coefficient of the variables

To get first row we take the coefficients of x and y from the equation x+2y = 5

x or 1x  are same

1x+2y = 5

The coefficient of x  is 1  and coefficient of y is 2

So first row is 1 , 2

We do the same for second row

To get second row we take the coefficients of x and y from the equation x-3y = 7

1x - 3y = 7

The coefficient of x  is 1  and coefficient of y is -3

So second row is 1, -3

45

step-by-step explanation:

add 8+12 to get a simplified answer of 12r-20