A state trooper is hidden 30 feet from a highway. One second after a truck passes, the angle “theta” between the highway and the line of observation from the patrol car to the truck is measured. If the angle measures 14 degrees, how fast is the truck traveling? Express the answer in feet per second and in miles per hour

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.