Solve the Linear Programming Problem $\begin{aligned}x-y & \geq-3 \\2 x+y & \leq 12 \\x & \geq 0 \\y & \geq 0\end{aligned}$

Q1: Determine the number of solutions to

Q2: Solve the system by the substitution

Q3: Find <span class="ql-formula" data-value="A^{-1}"><span class="katex"><span

Q4: <span class="ql-formula" data-value="\begin{aligned}x+2 y-3 z &=19 \\2

Q5: Solve the system by the elimination

Q7: The inverse of matrix <br> <span

Q8: Solve the system by elimination.<br> <span

Q9: Use Gaussian elimination to solve the

Q10: What is the partial fraction decomposition

Q11: Solve the system by substitution. <br>