The formula is base x height
X=58 the exterior angle is “D” 60degrees
3 times (2x + 5) is 6x + 15.
6x + 15 = 9 + 3x.
Group by like terms. 6 = -3x
Divide to get x by itself. 6/-3 = -2
Thus -2 = x
B, the lowest because would you rather pay 12% daily or monthly