Whats the answer any body knows

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

Which number line correctly shows 0.8 + 0.3?

Hormones perform important functions within the reproductive system. during puberty, a number of changes occur in the body. which hormone is responsible for the development of these characteristics in the female? estrogen progestin progesterone testosterone