Answer:
a)59.125, b)67.5, c)None
Step-by-step explanation:
Mean = All values added up and divided by the number of values

Median = Put all numbers in order from least to most and use the middle one, if there are two, use the mean of those two
. The middle ones are 60 & 75 so 
Mode = The number that repeats more times. In this case none of them repeat.
Dude I don’t feel like working
Three or more points that lie on the same line are collinear points. for example let’s say points D , B and E like on line N. does this help?
Answer:
m = 5, n = 2
Step-by-step explanation:

C. Region D
Step-by-step explanation:
Just plug the equations into desmos the calculator will graph it and show you with colors where the solution is.