bu-re-au
You would write it with two syllables like so: ap-peal.
There are 2 syllables. Bu-reau.
There are 2 syllables. Bur-eau.
Two.
ef-fec-tive
As "straight" is 1 syllable, it would simply be "straight".
There are 2 syllables. Type-write.
There are two syllables. Writ-ten.
Whe-ther has two syllables.
There are 4 syllables. Co-op-e-rate.
There are two syllables like so: fif-teen.
There are two syllables like so: mar-ket.