From the diagram above, find the area of the triangle PQR

The set {1,2,3,4,5} is equivalent to

Solve the simultaneous equation \(\frac{\text{x}}{2}\) - \(\frac{\text{y}}{5}\) = 1 and y - \(\frac{\text{x}}{3}\) = 8 

Solve the inequality 2x + 3 > 5x + 8

Given that a * b = \(\frac{a + b}{\text{ab}}\) + (a - b). Find the value of 3 * 2