In the circle, ab= 42, bc = 18 and cd= 4 what is the value of x? a. x=77 b. x=185 c. x=266 d. x=270 can someone ? i have no idea how to do this or what the answer will be.

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

If you were constructing a triangular frame, and you had wood in the length of 4inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no. explain your mathematical thinking

Nina has prepared the following two-column proof below. she is given that ∠oln ≅ ∠lno and she is trying to prove that ol ≅ on. triangle oln, where angle oln is congruent to angle lno nina made two errors in the proof. identify and correct the errors.