Categorize the solutions to the following expressions as positive or negative. Solve each expression and show all of your work. If necessary, round your answers to the nearest hundredth.
1. 5.4 ÷ (-2.3)
2. -17.3 (4.5)
3. -2.5 1.5
4. 4.5 x (-7.3)
5. -3.4 x (-5.6)​