Answer:
(-4,-8)
Step-by-step explanation:
You subtract 9 from the x coordinate because that it the coordinate that moves the point left or right.
5-9=-4
See figure below.
See the figure below.
As the mean is 90 then, the sum of the quantities are..
90×4 = 360
the scores you have are 86, 85, 96
so the answer is.
85+86+96= 262
360-262= 98
the fourth score is 98.
