Solve For $x$ Given the Following Equation Involving a Determinant $$\left| \begin{array} { c c } x + 1 & 7 \\- 1 & x + 9\end{array} \right| = 0$$

Q30: Solve the system by the method

Q31: Evaluate the expression.<br> <span class="ql-formula" data-value="\left[

Q32: Use a system of equations to

Q33: Given:<br> <span class="ql-formula" data-value="A = \left[

Q34: Find the inverse of the matrix

Q35: Solve system of equations by the

Q36: Write the system of linear equations

Q37: Use a system of equations to

Q39: Determine whether the two systems of

Q40: Solve the system by the method