Which of the following sets of side lengths could form a triangle?

5 in., 19 in., 23 in.
51 in., 54 in., 110 in.
20 in., 44 in., 65 in
2 ft., 4 ft., 60 ft.

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)