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

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