Help plsss ! 10 points !

Atriangle has side lengths of 15 inches and 30 inches. it also has angles that measure 45º and 20º. which of the following identifies the possible third angle of the triangle? a. 15 in., 65º b. 45 in., 65º c. 17 in., 115º d. 14 in., 115º

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.