What is the value of x in the solution to the system of linear equations? y - 2x = -1
14 + 2y = 8x

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

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

How to do this , and can some one explain