If m<9 = 105 and m<11 = 3x and m<3 = x + 85 What value of x makes line a parallel to line b?

PLEASE HELP AND EXPLAIN
Will give 15 more point if correct

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 23 = 10x a. -1.93, 11.93 b. 1.93, -11.93 c. 1.93, 11.93 d. -1.93, -11.93

Describe how making an ‘and’ compound sentence effects your solution set

Factor and solve to find roots x squared -x - 90 =0