What is the simplified form of each expression?

1.7m^2 + 6.5n - 4n + 2.5m^2 - n

2.5m^2 + 7.8n - 3.2n + 5.3m^2 - 5.9n

Find the slope of the line passing through a pair of points

The four students in the table below each recorded the time and distance traveled while exercising. exercising distance (miles) time (minutes) gia 2 30 harris 5 50 ian 3 40 jackson 4 80 which list ranks the students from fastest walker to slowest walker? jackson, gia, ian, harris harris, jackson, ian, gia harris, ian, gia, jackson jackson, harris, ian, gia

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22