Answer:
(3.5, -4.5) or option D
Step-by-step explanation:
x) (6 + 1) / 2 = 3.5
y) (-1 + (-8)) / 2 = -4.5
Answer:
11) mean=2 12) median=2 13)range =4
Step-by-step explanation:
11) the set is
0,0,1,1,1,2,2,2,2,2,3,3,3,4,4
so add all these which will give you 30 and then divide that by how many numbers are there in the set which there are 15, so 30 divided 15 =2
12) arrange numbers from smallest to largest and the number exactly in the middle is the median
13)biggest number-smallest number
System of equations subtraction method
In the addition/subtraction method, the two equations in the system are added or subtracted to create a new equation with only one variable. ... Substitute the variable back into one of the equations and solve for the other variable. Check the solution--it should satisfy both equations.

get rid of -2 by subtracting it from 21

Now you get your answer

Hope this helps! :)