Given $A = \left[ \begin{array} { c c } 1 & 5 \\- 2 & 3\end{array} \right]$

Q76: Write out the form of the

Q77: Given <span class="ql-formula" data-value="A =

Q78: State whether the equation <span

Q79: Use back-substitution to solve the triangular

Q80: Solve the system of linear equations.

Q82: Find all solutions for the system.

Q83: Find the partial fraction decomposition of

Q84: A money manager invests <span

Q85: Find <span class="ql-formula" data-value="A ^

Q86: The perimeter of a rectangle is