Answer:
As radius is perpendicular to tanget ,
BC is perpendicular to AB
By pythagoras theorem:
x² = (9 + x)² - 15²
x² = 81 + 18x + x² - 225
18x = 225 - 18
x = 207/18 = 11.5
They are all multiples of 12. 12x1, 12x2, 12x6, 12x24.
It depends on what integer is represented by 1 black cube.
If 1 black cube represents 1, then 3 black cubes represent 3.
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If one black cube represents 1,000,000, then 3 black cubes repesent 3,000,000.
-2 1/3 = -7/3 = -14/6
-14/6 + 11/6 = 3/6 = 1/2
Midpoint formula ((x1+x2)/2, (y1+y2)/2)
((4+10)/2, (2+4)/2)
answer is (7,3)