Prove that the diagonals of a parallelogram bisect each other.

The midpoint of AC is

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

Can someone me with these two circle theorem questions asap?

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park is the cost of admission proportional to the amount of people entering the amusement park? explain.