8.5b−3.4*(13a−3.2b)+a
i need help ASAP

Which expression is equivalent to sq-80

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

Which value would be a solution for x in the inequality 47-4x< 7