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OpenStudy (anonymous):
The perimeter of the triangle is 12x + 8. Find the missing side in polynomial form. A. 10x - 1 B. 21x - 2 C. 2x + 9
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OpenStudy (anonymous):
OpenStudy (anonymous):
perimeter is a+b+c
Directrix (directrix):
C. 2x + 9
Directrix (directrix):
12x + 8 - (7x - 2) - ( 3x + 1) =
OpenStudy (anonymous):
12x+8 = a + 7x-2 +3x+1 -a = -12x-8 + 10x-1 -a = -2x-9 a= 2x+9 and that is C
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