SOLUTION: It is estimated that the Earth is losing 4000 species of plants and animals per year. If S represents the number of species living last year year, how many species are on Earth th

Algebra ->  Functions -> SOLUTION: It is estimated that the Earth is losing 4000 species of plants and animals per year. If S represents the number of species living last year year, how many species are on Earth th      Log On


   

Question 39517: It is estimated that the Earth is losing 4000 species of plants and animals per year. If S represents the number of species living last year year, how many species are on Earth this year..
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Look at it this way...
No matter how many species there were last year, you would be subtracting 4000 to get this year's number...if there were 90,000 last year, you'd have 86,000 this year...
Thus if there were S species last year, there would be S - 4000 this year...