How do I do this problem I'm doing test corrections and I have no idea how to do it

3. solve by graphing: y = 2x + 6 x + y = -3

20 only answer if 100% sure most high school-aged teens are very active. a. true b. false

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