Do y’all know the answer to this!?

Astandard american eskimo dog has a mean weight of 30 pounds with a standard deviation of 2 pounds. assuming the weights of standard eskimo dogs are normally distributed, what range of weights would 99.7% of the dogs have? approximately 26–34 pounds approximately 24–36 pounds approximately 28–32 pounds approximately 29–31 pounds

The sum of two numbers is 86, and their difference is 20. find the two numbers

Which expression shows the sum of the polynomials with like terms grouped together