The best answer is C. Tailings are dangerous because they can release toxic elements into the groundwater or surface water. Tailings are the waste materials after the process of extracting the valuable part in a mine. These waste materials have a big potential to destroy the environment because they can release toxic substances which include arsenic and mercury. These tailings can contaminate water bodies.
Answer: x + 30 = 10 and x + 30 = –10
Explanation: The two equations can be used to find the minimum and maximum depths Laurie wants to stay between is the below:
x + 30 = 10 and x + 30 = -10
Hope this helps!
