Anybody can help me out?

What is the sum of these mixed numbers 2 1/8 + 4 3/8

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares