STEM Forest rangers estimate the age of trees by dividing a tree's radius by its average ring width, which represents a year's worth of growth. If an oak
tree has a circumference of 151 inches and an average ring width of inch,
approximately how old is the tree to the nearest whole year? Use 3.14 for .

The answer is 26 to 1

Ithink it’s a as the answer.

The answer should be c.

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.