Which is an obtuse angle?

∠cab

∠bac

∠bca

∠abc

Abcd is a parallelogram find the valuse of x

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?