Answer
0
Explanation
Formula for sum of interior angles:
(n - 2) • 180 = sum = 2205 °
Where n = number of sides
2205/180 = n - 2
12.25 = n - 2
14.25 = n
Answer is 0 as you can’t have a quarter of a side
(f+g-k)(x) means to add the equations f(x) and g(x) then subtract k(x)
2x^2 + 3x + 4x - 9 = 2x^2 +7x -9
2x^2 + 7x - 9 - x^2 -7x = x^2 -9
The answer is : x^2 - 9
is basically calculating the rate of change of the line
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