27.5
put the numbers in order
find median (134.5)
find lower quartile (121)
upper quartile (148.5)
subtract upper from lower to get 27.5
Answer:
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Step-by-step explanation:
Answer:
I really can't show a tree diagram on here, So i will come back to this question if I figure out how to do that.
Step-by-step explanation:
Answer:
a) (11/7, 9/7)
b) There's no point of intersection
Step-by-step explanation:
a) x - 2y + 1 = 0
2x + 3y - 7 = 0
To find the point of intersection, we need to solve the system of equations and the result will be the point of intersection (x,y)

Now we substitute x in the second equation:

Now we substitute y in our first equation.
.
The point of intersection is (11/7, 9/7)
b) x -2y +11 =0
-x + 2y - 13 =0
We are going to follow the same procedure:


Since this system of equations doesn't have a solution, the system has no point of intersection.