What is the equation of the line that passes through (15,9) and (-2,9)y=?

( x,y ) -> y is second number
so y=9.

We first determine the angle between the 83 mi and the 111 mi sides. Let this angle be represented by x, and use the cosine law to solve this:
165^2 = 83^2 + 111^2 - 2(83)(111)cos(x)
cos(x) = 115.8 degrees
Therefore, the angle north of west that the ship turned would be 180 - 115.8 = 64.2 degrees.