Which of the following are composite numbers? Check all that are true.
33
49
19
7
21

b.my answer is b.

brainliest

in geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel. by extension, a line and a plane, or two planes, in three-dimensional euclidean space that do not share a point are said to be parallel.