Please help me otherwise I will fail (1/2 + 1/2)* 700​

If u good at math hit me up on insta or sum @basic_jaiden or @ and

Manuela solved the equation below. what is the solution to manuela’s equation?

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.