Answer:
x = 13
Step-by-step explanation:
In a triangle, all the angles equal 180 so
2x + 5x - 7 + 6x + 18 = 180
combine like terms
13x + 11 = 180
13x = 169
543
coordinate point of B(2,5)
and coordinate point ofC(3,1)
Distance of BC
cos 330