If I do like a math and English dual major is my degree B.A. or B.Sc.?
Your school catalog will have that information.
It depends entirely on the school. I’m doing a double major leading to a BA and a BS, and my final degree will be a BAS (bachelors of arts and science). I know other schools award the degrees separately. There should be a section in your school’s catalog describing different degrees and/or discussing double majors that addresses this for your specific school.
And some schools only offer one or the other. For example, I’m pretty sure all of the programs at Columbia College of Columbia University culminate in a bachelor of arts, so a double major in physics and art or math and English would still get you a BA.
Depends on the school.
Major in math and English at Berkeley, graduate with a bachelor of arts.
Major in math and literature at MIT, graduate with a bachelor of science.