Question

Please help! Correct answer only, please! Consider the matrix shown below: Find the determinant of the matrix A. Group of answer choices A. The Determinant cannot be found for a matrix with these dimensions B. 11 C. 7 D. 23

Answer 1

Answer: d) 23

Step-by-step explanation:

Consider matrix $\left[\begin{array}{cc}a&b\\c&d\end{array}\right]$. The determinant is: ad - bc

In the matrix given, a = 5, b = -1, c = 3, d = 4

det A = ad - bc

        = 5(4) - 3(-1)

        = 20 - (-3)

        = 20 + 3

        = 23