Can someone answer this fast?
The determinant of matrix A is shown below.
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Replace x and y with the given values, solve the 4 equations in Matrix B:
4(3)+2 = 12+2 = 14
8(1) = 8
7-2(3) = 7-6 = 1
-7(1) +8 = -7+8 = 1
Now using the letter locations from Matrix A solve ad-bc:
14*1 - 8*1 = 14 - 8 = 6
The answer is 6