Evaluate $3 \times 3$ Determinant $$\left| \begin{array} { c c c } 1 & 4 & - 1 \\5 & 1 & 4 \\4 & 6 & 5\end{array} \right|$$

Q196: Solve the system by the substitution

Q197: Use Cramer s rule to find

Q198: Use the appropriate property of determinants

Q199: Solve the system by using either

Q200: Use a matrix approach to solve

Q202: Use a matrix approach to solve

Q203: Solve the system. <span class="ql-formula"

Q204: Consider the following matrix. <span

Q205: Solve the system. <span class="ql-formula"

Q206: Solve the system by the substitution