i will give brainliest to the best answer to this question: Each year, the Department of Water Works measures the chloride concentration level in the water. The first year, they found the chloride concentration changed by −135 mg/L . It is estimated that the chloride concentration will change −2115 mg/L the next year.What is the total change that will likely occur in 2 years?Enter your answer as a simplified mixed number in the box. ______mg/L

Answer:The total change that will likely occur in 2 years is [tex]=-3\frac{2}{3}[/tex] mg/L        Step-by-step explanation:Given : The first year, they found the chloride concentration changed by [tex]-1\frac{3}{5}[/tex] mg/L . It is estimated that the chloride concentration will change [tex]-2\frac{1}{15}[/tex] mg/L the next year.To find : What is the total change that will likely occur in 2 years?Solution :The chloride concentration changed by [tex]-1\frac{3}{5}=-\farc{8}{5}[/tex] mg/L in first year.The chloride concentration will change [tex]-2\frac{1}{15}=-\frac{31}{15}[/tex] mg/L the next year. The total change that will likely occur in 2 years is[tex]=-\frac{8}{5}+(-\frac{31}{15})[/tex] [tex]=\frac{-24-31}{15}[/tex] [tex]=\frac{-55}{15}[/tex] [tex]=\frac{-11}{3}[/tex] In a mixed fraction - [tex]=-3\frac{2}{3}[/tex] mg/L