Answer:
Step-by-step explanation:
add all divide by to total no.of value
64/4=16
mean=16
Let point A be 
and point B 
Use the point-slope formula and whichever point you want as , in this case I'll use
The bisector of the angle at A (call it AQ) divides the segment BC into segments BQ:QC having the ratio AB:AC. Use this fact to find x.
.. 9:15 = (2x -1):3x
.. 15(2x -1) = 9*3x . . . . . the product of the means equals the product of extremes
.. 30x -15 = 27x
.. 3x = 15
.. x = 5
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According to the value of x, the bisector AQ divides the triangle into two isosceles triangles: ABQ, ACQ.
