Plane acb
plane bac
plane bca
plane cab
plane cba
Aida did not correctly divide by the common factor to get (4+8).
R; all quadratic functions are going to have ranges and domains of *ALL REAL NUMBERS*.
The given angles are complementary, therefore:
(5r + 5) + (8r -6) = 90°
13r - 1 = 90
13r - 1 + 1 = 90 + 1
13r = 91
13r/13 = 91/13
r = 7
