Acamper wants to know the width of a river. from point a, he walks downstream 90 feet to point b and sights a canoe across the river. it is determined that = 24°. about how wide is the river? a. 82 feet b. 37 feet c. 202 feet d. 40 feet

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.

The answer is a. yes, it asks a question that can be answered correctly (by measuring hands).