Ty is 3 years younger than bea. what would the equation be?

According to the normal model, what percent of receivers would you expect to gain fewer yards than 2 standard deviations below the mean number of yards

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?