How do I delete comments I have posted? Also can I block people?

I may or may not have gotten in a argument and this is not why I'm here, I'm here for school.

Asmall car averages up to 29 more miles per gallon of gas that an suv. if a small car averages 44 miles per gallon, what is the average miles per gallon for an suv?

The number of lattes sold daily for two coffee shops is shown in the table: lattes 12 52 57 33 51 15 46 45 based on the data, what is the difference between the median of the data, including the possible outlier(s) and excluding the possible outlier(s)? 48.5 23 8.4 3

The sum of two numbers is 12 and their difference is 18 what are the two numbers