It is probably possible, but you would never have enough time to prepare etc. to do both well. English especially, with reading, evaluating, and marking papers. Teaching is not a 9-5 job.
I think you could do it. I had teacher friends that did. It would be easy to get a job because schools always need English and/or math teachers.
O.K. I'm a little woozey at the moment; however, I would like to suggest and comment. Is your question about the ability to teach math and essay english writing? Or is your question about do women and/or men teach this at the same time... And if so, have any of us been in classes that do so?
Bare with me here. #1. Yes. There are many talented and wonderful people who have the ability to teach both english and math.
#2. Yes. I went to public schools where the same person was able to teach and assign homework for both.
There are little to no teachers at my school who don't teach more than one subject, although most of them specialise and teach their 'secondary' subjects to grade 7, 8 and 9 students as well as their specialty
If you are absolutely brilliant in both (like me) and a good teacher (possibly unlike me) you might get away with it. Teachers should specialize in two subjects. Teaching and their core subject.