The simplified expression is 10m + 20.5, where m stands for the total number of months.
Initially, we can express her expenses as follows:
8.5 + 62.5m and 12 + 3.75m.
Adding these two expressions together yields a combined equation of:
10m + 20.5.
Events A and B are termed independent when

if not, events A and B are classified as dependent.
The events A, B and A∩B are:
- A - Jane plans to attend a ballgame on Monday;
- B - Kate intends to go to a ballgame on Monday;
- A∩B - Both Kate and Jane will be at the ballgame on Monday.

Answer: events A and B are dependent
A school principal utilized a bar chart to present his report, where he allocated the horizontal axis for the names of the students and the vertical axis for their grades. In this setup, the x-axis represents the names of the students, while the y-axis shows their respective grades. To convey complete data, there should be multiple bars for each student, as one single bar wouldn't provide thorough information.
The range of the function on the graph includes all numbers greater than or equal to -3.