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.

Answer 1

Answer:

-4095??

Step-by-step explanation:

im not sure but what i understand has led me to this solution:

-2115 - (-135)= 1980

(-1980) + (-2115)