How do I do this? Multiply:
(x-9)²

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

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

In angle pqr find the measure of